feat(dom): nowrap per inline, Appendix E layer 8 in tree order, real Headers on fetch by MarcosBrendonDePaula · Pull Request #2764 · UrubuCode/rts

MarcosBrendonDePaula · 2026-09-25T22:12:13Z

Wave 4 (#2731). Per file against main: css-position 54 → 65, white-space 176 → 180, normal-flow +2, flexbox +1, floats +1, 0 lost; parity 177/177; corpus identical; suite 890/905 lost list empty; 1 310 + 137 crate tests. Two regressions the ruler caught on the first run are fixed with red-first tests.

🤖 Generated with Claude Code

https://claude.ai/code/session_01ERaR4gN9psf59ofSFpqZaf

…e — squashed in the PR

…Headers on fetch `white-space: nowrap`/`pre` now withhold soft wrap opportunities PER INLINE RUN (`WhiteSpaceRegime::wraps`), not for the whole flow: a nowrap span glues only its own spaces, a normal span inside `<pre>` wraps again, and the infinite line width applies only when no run of the flow wraps. Two corrections the per-file ruler forced before merge, each with a test that was red: a collapsible space at the start of a line still collapses under nowrap (§4.1.3 phase II — `claude-word-spacing` measured x=8.8 where Blink gives 0), and a glued space no longer counts a pending separator twice (`float-nowrap-4/7`). Appendix E layer 8: an out-of-flow box with `z-index: auto`/`0` is spliced into the piece sequence before the first `position: relative` box of the same layer that follows it in tree order (`empilhamento::splice_layer8`), instead of always after the whole flow — no stored index, the position is found at splice time. Its first version applied a cached fragment's reuse offset twice when descending into a `Piece::Child`; eight `position-relative-table-*-absolute-child` reftests caught it, fixed by cancelling the offset before the insert. `fetch()` in rts-node hands back the `Headers` global rts-std already implements instead of a plain object; the reentrancy of `entry::construct` inside `with_runtime` this uncovered is written down at the site. `quebra.rs` and `linha.rs` split back under the 500-line ceiling (`quebra_particao.rs`, `linha_atomos.rs`), byte-identical PNGs. Measured per file against main: css-position 54 → 65, css-text/white-space 176 → 180, CSS2/normal-flow +2, css-flexbox +1, CSS2/floats +1, 0 lost; paint parity 177/177; CSS corpus identical; suite 890/905, lost list empty; `cargo test -p rts-dom --lib` 1 310, `-p rts-node --lib` 137. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01ERaR4gN9psf59ofSFpqZaf

github-actions · 2026-09-25T22:33:59Z

Cross-runtime parity (RTS vs Bun vs Node)

Metric	Value
Total	1516
✅ Pass	1275
❌ RTS diverges	180
⚠️ Bun ≠ Node	0
💥 RTS error	60
🚫 Rejected	0

Divergences detected

claude-array-index-upper-boundary — rts_diverge

Bun output:

maxIndexLen=4294967295
maxIndexVal=last
maxIndexKeys=4294967294
maxIndexIn=false true
beyondLen=0
beyondKeys=4294967295
beyondVal=beyond
aboveLen=0 keys=4294967296
setMaxLen=4294967295 keys=0
setBeyond=RangeError
stillMax=4294967295
ctorMax=4294967295
ctorBeyond=RangeError
ctorNeg=RangeError
ctorFrac=RangeError
hugeLen=4000000001 hugeKeys=1 hugeLast=x
hugeHas=true false

Node output:

maxIndexLen=4294967295
maxIndexVal=last
maxIndexKeys=4294967294
maxIndexIn=false true
beyondLen=0
beyondKeys=4294967295
beyondVal=beyond
aboveLen=0 keys=4294967296
setMaxLen=4294967295 keys=0
setBeyond=RangeError
stillMax=4294967295
ctorMax=4294967295
ctorBeyond=RangeError
ctorNeg=RangeError
ctorFrac=RangeError
hugeLen=4000000001 hugeKeys=1 hugeLast=x
hugeHas=true false

RTS output:

maxIndexLen=4294967295
maxIndexVal=last
maxIndexKeys=4294967294
maxIndexIn=false true
beyondLen=0
beyondKeys=4294967295
beyondVal=beyond
aboveLen=0 keys=4294967296
setMaxLen=4294967295 keys=0
stillMax=4294967296
ctorMax=4294967295
ctorBeyond=RangeError
ctorNeg=RangeError
ctorFrac=RangeError
hugeLen=4000000001 hugeKeys=1 hugeLast=undefined
hugeHas=true false

claude-array-length-truncation-and-nonwritable — rts_diverge

Bun output:

trunc=[0,1] len=2
idx2=undefined has2=false
grow=5 holes=yynnn
strLen=1 [1]
throw -1 -> RangeError
throw 1.5 -> RangeError
throw NaN -> RangeError
throw 4294967296 -> RangeError
throw Infinity -> RangeError
blockedSet=false
blockedLen=3 kept=0,1,22
desc=true,false,false
frozenSet=false len=2
frozenDesc=false

Node output:

trunc=[0,1] len=2
idx2=undefined has2=false
grow=5 holes=yynnn
strLen=1 [1]
throw -1 -> RangeError
throw 1.5 -> RangeError
throw NaN -> RangeError
throw 4294967296 -> RangeError
throw Infinity -> RangeError
blockedSet=false
blockedLen=3 kept=0,1,22
desc=true,false,false
frozenSet=false len=2
frozenDesc=false

RTS output:

trunc=[0,1] len=2
idx2=undefined has2=false
grow=5 holes=yynnn
strLen=1 []
ok -1 -> -1
ok 1.5 -> 1.5
ok NaN -> NaN
ok 4294967296 -> 4294967296
ok Infinity -> Infinity
blockedSet=true
blockedLen=0 kept=
desc=true,false,false
frozenSet=false len=2
frozenDesc=false

claude-fill-shares-reference-and-clamps — rts_diverge

Bun output:

shared=9,9,9 same=true
all=9,9,9,9,9
from2=0,1,9,9,9
fromNeg2=0,1,2,9,9
two_four=0,1,9,9,4
neg=0,1,9,9,4
startGtEnd=0,1,2,3,4
beyond=0,1,2,3,4
nan=0,1,2,3,4
undefEnd=0,9,9,9,9
frac=0,9,9,3,4
holesIn=yyyyy v=1,0,0,0,5
identity=true
like=undefined,z,z
frozen=TypeError

Node output:

shared=9,9,9 same=true
all=9,9,9,9,9
from2=0,1,9,9,9
fromNeg2=0,1,2,9,9
two_four=0,1,9,9,4
neg=0,1,9,9,4
startGtEnd=0,1,2,3,4
beyond=0,1,2,3,4
nan=0,1,2,3,4
undefEnd=0,9,9,9,9
frac=0,9,9,3,4
holesIn=yyyyy v=1,0,0,0,5
identity=true
like=undefined,z,z
frozen=TypeError

RTS output:

shared=9,9,9 same=true
all=9,9,9,9,9
from2=0,1,9,9,9
fromNeg2=0,1,2,9,9
two_four=0,1,9,9,4
neg=0,1,9,9,4
startGtEnd=0,1,2,3,4
beyond=0,1,2,3,4
nan=0,1,2,3,4
undefEnd=0,9,9,9,9
frac=0,9,9,3,4
holesIn=yyyyy v=1,0,0,0,5
identity=true
like=undefined,undefined,undefined

claude-from-async-iterables-and-arraylike — rts_diverge

Bun output:

iterable=10,20 order=y1 m0 y2 m1
arrayLike=a,undefined,c
arrayLikeIn=yyy
negLen=0
nanLen=0
fracLen=2
strLen=2
noLen=0
string=3
stringLike=3
mapArity=2,2
ctor=C len=2 v=12
badMap=TypeError
pulledAfterBadMap=false
set=1,2
map=1:a
of=1 ctor=3

Node output:

iterable=10,20 order=y1 m0 y2 m1
arrayLike=a,undefined,c
arrayLikeIn=yyy
negLen=0
nanLen=0
fracLen=2
strLen=2
noLen=0
string=3
stringLike=3
mapArity=2,2
ctor=C len=2 v=12
badMap=TypeError
pulledAfterBadMap=false
set=1,2
map=1:a
of=1 ctor=3

RTS output:

iterable=10,20 order=y1 m0 y2 m1
arrayLike=a,undefined,c
arrayLikeIn=yyy
negLen=0
nanLen=0
fracLen=2
strLen=2
noLen=0
string=3
stringLike=3
mapArity=3,3
ctor=C len=2 v=12
pulledAfterBadMap=true
set=1,2
map=1:a
of=1 ctor=3

claude-generic-methods-on-arraylike — rts_diverge

Bun output:

join=a-b-c
slice=["b","c"]
indexOf=1
map=["a!","b!","c!"]
filter=["a","c"]
includes=true
at=c
pushLen=2 v=xy
pop=y len=1 has1=false
strLength=1,2
negLength=|
fracLength=1,2
sparseVisits=1
sparseJoin=,mid,
strJoin=a.b.c
strMap=["A","B"]
strSlice=["b","c"]
onNumber=[]
onBool=|
onNull=TypeError
onUndef=TypeError

Node output:

join=a-b-c
slice=["b","c"]
indexOf=1
map=["a!","b!","c!"]
filter=["a","c"]
includes=true
at=c
pushLen=2 v=xy
pop=y len=1 has1=false
strLength=1,2
negLength=|
fracLength=1,2
sparseVisits=1
sparseJoin=,mid,
strJoin=a.b.c
strMap=["A","B"]
strSlice=["b","c"]
onNumber=[]
onBool=|
onNull=TypeError
onUndef=TypeError

RTS output:

join=a-b-c
slice=["b","c"]
indexOf=undefined
map=["a!","b!","c!"]
filter=["a","c"]
includes=false
at=c
pushLen=0 v=undefinedundefined
pop=undefined len=0 has1=false
strLength=undefined
negLength=|
fracLength=1,2
sparseVisits=1
sparseJoin=,mid,
strJoin=undefined
strMap=undefined
strSlice=undefined
onNumber=undefined
onBool=undefined|

claude-join-cycle-detection — rts_error

Bun output:

self=1,2,
selfToString=1,2,
mutual_b=1-2,
mutual_c=2-1,
triple=||9
again=1,2,
obj=O,1
nested=1,2,3,4
nestedStr=1,2,3,4

Node output:

self=1,2,
selfToString=1,2,
mutual_b=1-2,
mutual_c=2-1,
triple=||9
again=1,2,
obj=O,1
nested=1,2,3,4
nestedStr=1,2,3,4

RTS output:

claude-push-pop-shift-unshift-boundaries — rts_diverge

Bun output:

popEmpty=undefined len=0
shiftEmpty=undefined len=0
pushNone=2
pushMany=3
unshiftNone=2
unshiftMany=3
unshiftHoles=yyny v=a,1,,3
shiftHole=undefined len=3 in=yny
popHole=undefined len=1
genericPush=3 len=3 v=c
genericPop=c len=2 has2=false
noLenPush=1 len=1 v=x
strLenPush=2 v=b type=number
pushOverflow=TypeError
frozenPopThrew=true
frozenLen=2
returnType=number number undefined
sparseShift=undefined len=3 keys=2

Node output:

popEmpty=undefined len=0
shiftEmpty=undefined len=0
pushNone=2
pushMany=3
unshiftNone=2
unshiftMany=3
unshiftHoles=yyny v=a,1,,3
shiftHole=undefined len=3 in=yny
popHole=undefined len=1
genericPush=3 len=3 v=c
genericPop=c len=2 has2=false
noLenPush=1 len=1 v=x
strLenPush=2 v=b type=number
pushOverflow=TypeError
frozenPopThrew=true
frozenLen=2
returnType=number number undefined
sparseShift=undefined len=3 keys=2

RTS output:

popEmpty=undefined len=0
shiftEmpty=undefined len=0
pushNone=2
pushMany=3
unshiftNone=2
unshiftMany=3
unshiftHoles=yyny v=a,1,,3
shiftHole=undefined len=3 in=yny
popHole=undefined len=1
genericPush=undefined len=2 v=undefined
genericPop=undefined len=2 has2=false
noLenPush=undefined len=undefined v=undefined
strLenPush=1 v=undefined type=string
frozenPopThrew=true
frozenLen=2
returnType=number number undefined
sparseShift=undefined len=3 keys=2

claude-reverse-holes-and-arraylike — rts_diverge

Bun output:

in=ynyny v=4,,2,,0
oddIn=yny v=2,,0
holeOnlyLen=1 in0=false
identity=true len=3 v=3,2,1
toRevIn=yyy v=2,undefined,0
like=c,hole,a
onString=TypeError

Node output:

in=ynyny v=4,,2,,0
oddIn=yny v=2,,0
holeOnlyLen=1 in0=false
identity=true len=3 v=3,2,1
toRevIn=yyy v=2,undefined,0
like=c,hole,a
onString=TypeError

RTS output:

in=ynyny v=4,,2,,0
oddIn=yny v=2,,0
holeOnlyLen=1 in0=false
identity=true len=3 v=3,2,1
toRevIn=yyy v=2,undefined,0
like=a,hole,c

claude-species-and-subclass-derivation — rts_diverge

Bun output:

isSub=true isArr=true
map=true
filter=true
slice=true
splice=true
concat=true
flat=true
flatMap=true
toSorted=false
toReversed=false
toSpliced=false
with=false
join=string
reduceType=number
speciesArray=false isArr=true
nullSpecies=true
badSpecies=TypeError
ctorCalls=0:undefined 1:3 1:0
ofSub=true fromSub=true
arraySpecies=true
subSpecies=true

Node output:

isSub=true isArr=true
map=true
filter=true
slice=true
splice=true
concat=true
flat=true
flatMap=true
toSorted=false
toReversed=false
toSpliced=false
with=false
join=string
reduceType=number
speciesArray=false isArr=true
nullSpecies=true
badSpecies=TypeError
ctorCalls=0:undefined 1:3 1:0
ofSub=true fromSub=true
arraySpecies=true
subSpecies=true

RTS output:

isSub=true isArr=true
map=true
filter=true
slice=true
splice=true
concat=true
flat=true
flatMap=false
toSorted=false
toReversed=false
toSpliced=false
with=false
join=string
reduceType=number
speciesArray=false isArr=true
nullSpecies=true
ctorCalls=0:undefined 1:3 1:0
ofSub=true fromSub=true
arraySpecies=true
subSpecies=true

claude-splice-negative-and-overflow-args — rts_error

Bun output:

start2 removed=[2,3,4] rest=[0,1] len=2
startNeg2 removed=[3,4] rest=[0,1,2] len=3
startNeg99 removed=[0,1,2,3,4] rest=[] len=0
start99 removed=[] rest=[0,1,2,3,4] len=5
startNaN removed=[0,1,2,3,4] rest=[] len=0
startUndef removed=[0,1,2,3,4] rest=[] len=0
count_neg5 removed=[] rest=[0,1,2,3,4] len=5
count_99 removed=[1,2,3,4] rest=[0] len=1
count_NaN removed=[] rest=[0,1,2,3,4] len=5
count0_ins removed=[] rest=[0,a,b,1,2,3,4] len=7
neg1_1_ins removed=[4] rest=[0,1,2,3,x] len=5
none removed=[] rest=[0,1,2,3,4] len=5
frac removed=[1,2,3,4] rest=[0] len=1
strings removed=[2] rest=[0,1,3,4] len=4
grow=1,a,b,c,2 retIsArray=true retLen=0
remIn=nyn rem=,3,
leftIn=yy left=1,5

Node output:

start2 removed=[2,3,4] rest=[0,1] len=2
startNeg2 removed=[3,4] rest=[0,1,2] len=3
startNeg99 removed=[0,1,2,3,4] rest=[] len=0
start99 removed=[] rest=[0,1,2,3,4] len=5
startNaN removed=[0,1,2,3,4] rest=[] len=0
startUndef removed=[0,1,2,3,4] rest=[] len=0
count_neg5 removed=[] rest=[0,1,2,3,4] len=5
count_99 removed=[1,2,3,4] rest=[0] len=1
count_NaN removed=[] rest=[0,1,2,3,4] len=5
count0_ins removed=[] rest=[0,a,b,1,2,3,4] len=7
neg1_1_ins removed=[4] rest=[0,1,2,3,x] len=5
none removed=[] rest=[0,1,2,3,4] len=5
frac removed=[1,2,3,4] rest=[0] len=1
strings removed=[2] rest=[0,1,3,4] len=4
grow=1,a,b,c,2 retIsArray=true retLen=0
remIn=nyn rem=,3,
leftIn=yy left=1,5

RTS output:

start2 removed=[2,3,4] rest=[0,1] len=2
startNeg2 removed=[3,4] rest=[0,1,2] len=3
startNeg99 removed=[0,1,2,3,4] rest=[] len=0
start99 removed=[] rest=[0,1,2,3,4] len=5
startNaN removed=[0,1,2,3,4] rest=[] len=0
startUndef removed=[0,1,2,3,4] rest=[] len=0
count_neg5 removed=[] rest=[0,1,2,3,4] len=5
count_99 removed=[1,2,3,4] rest=[0] len=1
count_NaN removed=[] rest=[0,1,2,3,4] len=5
count0_ins removed=[] rest=[0,a,b,1,2,3,4] len=7
neg1_1_ins removed=[4] rest=[0,1,2,3,x] len=5
none removed=[] rest=[0,1,2,3,4] len=5
frac removed=[1,2,3,4] rest=[0] len=1

claude2-array-length-and-defineproperty-interplay — rts_diverge

Bun output:

defineSmaller=true 2[0,1]
shrinkAndLock=true 1[0]
lockedDesc={"value":1,"writable":false,"enumerable":false,"configurable":false}
pushAfterLock=TypeError:1
setAfterLock=false 1[0]
indexWriteAfterLock=false 1[0]
index0WriteAfterLock=true v=y
unlock=false
sameValueRedefine=true
makeEnumerable=false
makeConfigurable=false
makeAccessor=false
cDesc={"value":1,"writable":true,"enumerable":false,"configurable":false}
blocked=false 3[0,1,2]
blockedAgain=false 3[0,1,2]
blockedGrow=true len=9
defineIndex5=true 6[0,5]
defineIndex0=true 6[0,5]
defineStrKey=true 6[0,5,007]
defineFloatKey=true 6[0,5,007,1.5]
accessorIndex=1[0] v=computed join=computed json=["computed"]
accessorMap=["computed"]
nonEnumIndex=2[0] join=1,2 json=[1,2]
nonEnumForEach=2
nonEnumForIn=0

Node output:

defineSmaller=true 2[0,1]
shrinkAndLock=true 1[0]
lockedDesc={"value":1,"writable":false,"enumerable":false,"configurable":false}
pushAfterLock=TypeError:1
setAfterLock=false 1[0]
indexWriteAfterLock=false 1[0]
index0WriteAfterLock=true v=y
unlock=false
sameValueRedefine=true
makeEnumerable=false
makeConfigurable=false
makeAccessor=false
cDesc={"value":1,"writable":true,"enumerable":false,"configurable":false}
blocked=false 3[0,1,2]
blockedAgain=false 3[0,1,2]
blockedGrow=true len=9
defineIndex5=true 6[0,5]
defineIndex0=true 6[0,5]
defineStrKey=true 6[0,5,007]
defineFloatKey=true 6[0,5,007,1.5]
accessorIndex=1[0] v=computed join=computed json=["computed"]
accessorMap=["computed"]
nonEnumIndex=2[0] join=1,2 json=[1,2]
nonEnumForEach=2
nonEnumForIn=0

RTS output:

defineSmaller=true 2[0,1]
shrinkAndLock=true 1[0]
lockedDesc={"value":1,"writable":true,"enumerable":false,"configurable":false}
pushAfterLock=no-throw:2
setAfterLock=true 5[0,1]
indexWriteAfterLock=true 5[0,1]
index0WriteAfterLock=true v=y
unlock=true
sameValueRedefine=true
makeEnumerable=false
makeConfigurable=false
makeAccessor=false
cDesc={"value":1,"writable":true,"enumerable":false,"configurable":false}
blocked=false 3[0,1,2]
blockedAgain=true 1[0]
blockedGrow=true len=9
defineIndex5=true 6[0,5]
defineIndex0=true 6[0,5]
defineStrKey=true 6[0,5,007]
defineFloatKey=true 6[0,5,007,1.5]
accessorIndex=0[0] v=undefined join= json=[]
accessorMap=[]
nonEnumIndex=2[0,1] join=1,2 json=[1,2]
nonEnumForEach=2
nonEnumForIn=0,1

claude2-lastindexof-and-search-direction — rts_diverge

Bun output:

idx_default=0 last_default=3
idx_from3=3 last_from3=3
idx_from0=2 last_from0=-1
idx_neg1=5 last_neg1=5
idx_neg99=0 last_neg99=-1
idx_99=-1 last_99=3
idx_nan=0 last_nan=0
idx_undef=0 last_undef=0
idx_frac=1 last_frac=1
idx_str=4 last_str=4
arity1=5 arity2=-1
lengths=1,1
strNum=-1,-1
nan=-1,-1
negZero=0,0
objIdentity=0,-1
holes=0,2
allHoles=-1,-1
empty=-1,-1
generic=0,2
shortLen=0
findLast=undefined findLastIndex=2
findLastProbes=3
findLastOrder=30,20
findOrder=10,20

Node output:

idx_default=0 last_default=3
idx_from3=3 last_from3=3
idx_from0=2 last_from0=-1
idx_neg1=5 last_neg1=5
idx_neg99=0 last_neg99=-1
idx_99=-1 last_99=3
idx_nan=0 last_nan=0
idx_undef=0 last_undef=0
idx_frac=1 last_frac=1
idx_str=4 last_str=4
arity1=5 arity2=-1
lengths=1,1
strNum=-1,-1
nan=-1,-1
negZero=0,0
objIdentity=0,-1
holes=0,2
allHoles=-1,-1
empty=-1,-1
generic=0,2
shortLen=0
findLast=undefined findLastIndex=2
findLastProbes=3
findLastOrder=30,20
findOrder=10,20

RTS output:

idx_default=0 last_default=3
idx_from3=3 last_from3=3
idx_from0=2 last_from0=-1
idx_neg1=5 last_neg1=5
idx_neg99=0 last_neg99=-1
idx_99=-1 last_99=3
idx_nan=0 last_nan=3
idx_undef=0 last_undef=3
idx_frac=1 last_frac=1
idx_str=1 last_str=-1
arity1=5 arity2=5
lengths=1,1
strNum=-1,-1
nan=-1,-1
negZero=0,0
objIdentity=0,-1
holes=0,2
allHoles=-1,-1
empty=-1,-1
generic=undefined,undefined
shortLen=undefined
findLast=undefined findLastIndex=2
findLastProbes=3
findLastOrder=30,20
findOrder=10,20

claude2-spread-vs-from-vs-concat-protocols — rts_error

Bun output:

spread=it0,it1 pulls=pull0 pull1 pull2
from=it0,it1 pulls=pull0 pull1 pull2
concat=1 pulls=
sliceCall=i0,i1,i2 pulls=
patchedSpread=A,B
patchedFrom=A,B
patchedSlice=1,2,3
patchedConcat=1,2,3
patchedJoin=1,2,3
patchedForOf=A,B
holes spread=yyy from=yyy slice=yny concat=yny
strSpread=2 strFrom=2 strSlice=3
setSpread=1,2 setSliceLen=0
callSpread=2:it0|it1
objSpread={"0":"i0","1":"i1","2":"i2","length":3}
objSpreadArray={"0":1,"2":3}
objSpreadString={"0":"a","1":"b"}
spreadPlain=TypeError
objSpreadNull={"k":1}
fromPlain=0
badIterSpread=TypeError
badIterFrom=TypeError
undefIterFrom=z

Node output:

spread=it0,it1 pulls=pull0 pull1 pull2
from=it0,it1 pulls=pull0 pull1 pull2
concat=1 pulls=
sliceCall=i0,i1,i2 pulls=
patchedSpread=A,B
patchedFrom=A,B
patchedSlice=1,2,3
patchedConcat=1,2,3
patchedJoin=1,2,3
patchedForOf=A,B
holes spread=yyy from=yyy slice=yny concat=yny
strSpread=2 strFrom=2 strSlice=3
setSpread=1,2 setSliceLen=0
callSpread=2:it0|it1
objSpread={"0":"i0","1":"i1","2":"i2","length":3}
objSpreadArray={"0":1,"2":3}
objSpreadString={"0":"a","1":"b"}
spreadPlain=TypeError
objSpreadNull={"k":1}
fromPlain=0
badIterSpread=TypeError
badIterFrom=TypeError
undefIterFrom=z

RTS output:

spread=it0,it1 pulls=pull0 pull1 pull2
from=it0,it1 pulls=pull0 pull1 pull2
concat=1 pulls=
sliceCall=i0,i1,i2 pulls=
patchedSpread=1,2,3
patchedFrom=1,2,3
patchedSlice=1,2,3
patchedConcat=1,2,3
patchedJoin=1,2,3
patchedForOf=A,B
holes spread=yyy from=yyy slice=yny concat=yny

codex3_021_array_length_shrink_rollback — rts_diverge

Bun output:

true 3 0,1,2
2 undefined undefined

Node output:

true 3 0,1,2
2 undefined undefined

RTS output:

false 1 0
undefined undefined undefined

codex3_022_array_map_holes_getter_mutation — rts_diverge

Bun output:

0:10|1:2|3:4
4 0,1,3 [20,4,null,8]
5

Node output:

0:10|1:2|3:4
4 0,1,3 [20,4,null,8]
5

RTS output:

0:1|1:2|2:3|3:4
4 0,1,2,3 [2,4,6,8]
4

codex3_025_array_sort_accessor_sideeffects — rts_diverge

Bun output:

2 3
get0|set0:1

Node output:

2 3
get0|set0:1

RTS output:

2 3

claude-asintn-asuintn-wrapping — rts_diverge

Bun output:

bits=0 v=0 int=0 uint=0
bits=0 v=1 int=0 uint=0
bits=0 v=-1 int=0 uint=0
bits=0 v=255 int=0 uint=0
bits=1 v=0 int=0 uint=0
bits=1 v=1 int=-1 uint=1
bits=1 v=2 int=0 uint=0
bits=1 v=3 int=-1 uint=1
bits=1 v=-1 int=-1 uint=1
bits=1 v=-2 int=0 uint=0
bits=8 v=127 int=127 uint=127
bits=8 v=128 int=-128 uint=128
bits=8 v=255 int=-1 uint=255
bits=8 v=256 int=0 uint=0
bits=8 v=-1 int=-1 uint=255
bits=8 v=-128 int=-128 uint=128
bits=8 v=-129 int=127 uint=127
bits=32 v=2147483647 int=2147483647 uint=2147483647
bits=32 v=2147483648 int=-2147483648 uint=2147483648
bits=32 v=4294967295 int=-1 uint=4294967295
bits=32 v=4294967296 int=0 uint=0
bits=32 v=-2147483648 int=-2147483648 uint=2147483648
bits=64 v=9223372036854775807 int=9223372036854775807 uint=9223372036854775807
bits=64 v=9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=18446744073709551615 int=-1 uint=18446744073709551615
bits=64 v=18446744073709551616 int=0 uint=0
bits=64 v=-9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=-9223372036854775809 int=9223372036854775807 uint=9223372036854775807
bits=128 v=1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
bits=128 v=-1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
idempotent=true
floatBits=44
strBits=44
negBits=RangeError
numberValue=TypeError
strValue=44
type=bigint

Node output:

bits=0 v=0 int=0 uint=0
bits=0 v=1 int=0 uint=0
bits=0 v=-1 int=0 uint=0
bits=0 v=255 int=0 uint=0
bits=1 v=0 int=0 uint=0
bits=1 v=1 int=-1 uint=1
bits=1 v=2 int=0 uint=0
bits=1 v=3 int=-1 uint=1
bits=1 v=-1 int=-1 uint=1
bits=1 v=-2 int=0 uint=0
bits=8 v=127 int=127 uint=127
bits=8 v=128 int=-128 uint=128
bits=8 v=255 int=-1 uint=255
bits=8 v=256 int=0 uint=0
bits=8 v=-1 int=-1 uint=255
bits=8 v=-128 int=-128 uint=128
bits=8 v=-129 int=127 uint=127
bits=32 v=2147483647 int=2147483647 uint=2147483647
bits=32 v=2147483648 int=-2147483648 uint=2147483648
bits=32 v=4294967295 int=-1 uint=4294967295
bits=32 v=4294967296 int=0 uint=0
bits=32 v=-2147483648 int=-2147483648 uint=2147483648
bits=64 v=9223372036854775807 int=9223372036854775807 uint=9223372036854775807
bits=64 v=9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=18446744073709551615 int=-1 uint=18446744073709551615
bits=64 v=18446744073709551616 int=0 uint=0
bits=64 v=-9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=-9223372036854775809 int=9223372036854775807 uint=9223372036854775807
bits=128 v=1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
bits=128 v=-1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
idempotent=true
floatBits=44
strBits=44
negBits=RangeError
numberValue=TypeError
strValue=44
type=bigint

RTS output:

bits=0 v=0 int=0 uint=0
bits=0 v=1 int=0 uint=0
bits=0 v=-1 int=0 uint=0
bits=0 v=255 int=0 uint=0
bits=1 v=0 int=0 uint=0
bits=1 v=1 int=-1 uint=1
bits=1 v=2 int=0 uint=0
bits=1 v=3 int=-1 uint=1
bits=1 v=-1 int=-1 uint=1
bits=1 v=-2 int=0 uint=0
bits=8 v=127 int=127 uint=127
bits=8 v=128 int=-128 uint=128
bits=8 v=255 int=-1 uint=255
bits=8 v=256 int=0 uint=0
bits=8 v=-1 int=-1 uint=255
bits=8 v=-128 int=-128 uint=128
bits=8 v=-129 int=127 uint=127
bits=32 v=2147483647 int=2147483647 uint=2147483647
bits=32 v=2147483648 int=-2147483648 uint=2147483648
bits=32 v=4294967295 int=-1 uint=4294967295
bits=32 v=4294967296 int=0 uint=0
bits=32 v=-2147483648 int=-2147483648 uint=2147483648
bits=64 v=9223372036854775807 int=9223372036854775807 uint=9223372036854775807
bits=64 v=9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=18446744073709551615 int=-1 uint=18446744073709551615
bits=64 v=18446744073709551616 int=0 uint=0
bits=64 v=-9223372036854775808 int=-9223372036854775808 uint=9223372036854775808
bits=64 v=-9223372036854775809 int=9223372036854775807 uint=9223372036854775807
bits=128 v=1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
bits=128 v=-1606938044258990275541962092341162602522202993782792835301376 int=0 uint=0
idempotent=true
floatBits=44
strBits=44
negBits=RangeError
strValue=undefined
type=bigint

claude-bigint-constructor-string-forms — rts_diverge

Bun output:

plain=10n
padded=10n
tabbed=10n
empty=0n
blank=0n
nbsp_only=0n
bom_wrapped=10n
plus=10n
minus=-10n
minus_zero=0n
plus_zero=0n
leading_zeros=7n
inner_space!SyntaxError
trailing_junk!SyntaxError
long=123456789012345678901234567890n
hex_lower=31n
hex_upper=31n
binary=5n
binary_upper=5n
octal=15n
octal_upper=15n
hex_signed!SyntaxError
hex_plus!SyntaxError
bare_0x!SyntaxError
legacy_octal=17n
fraction!SyntaxError
trailing_dot!SyntaxError
leading_dot!SyntaxError
exponent!SyntaxError
exponent_upper!SyntaxError
separator!SyntaxError
bigint_suffix!SyntaxError
infinity!SyntaxError
neg_infinity!SyntaxError
nan_string!SyntaxError
num_int=10n
num_neg=-10n
num_zero=0n
num_negzero=0n
num_fraction!RangeError
num_tiny_fraction!RangeError
num_nan!RangeError
num_infinity!RangeError
num_neg_infinity!RangeError
num_2pow53=9007199254740992n
num_2pow53_plus1_literal=9007199254740992n
num_1e21=1000000000000000000000n
num_max_value=179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368n
num_min_value!RangeError
true=1n
false=0n
null!TypeError
undefined!TypeError
symbol!TypeError
bigint_itself=7n
empty_array=0n
array_one=15n
array_two!SyntaxError
array_nested=7n
plain_object!SyntaxError
valueof_num=7n
valueof_frac!RangeError
valueof_string=16n
tostring_only=42n
number_wrapper=9n
string_wrapper=9n
bigint_wrapper=9n
new_BigInt!TypeError
BigInt_length=1
BigInt_name=BigInt
has_prototype=object
proto_tag=BigInt
asIntN_length=2
asUintN_length=2

Node output:

plain=10n
padded=10n
tabbed=10n
empty=0n
blank=0n
nbsp_only=0n
bom_wrapped=10n
plus=10n
minus=-10n
minus_zero=0n
plus_zero=0n
leading_zeros=7n
inner_space!SyntaxError
trailing_junk!SyntaxError
long=123456789012345678901234567890n
hex_lower=31n
hex_upper=31n
binary=5n
binary_upper=5n
octal=15n
octal_upper=15n
hex_signed!SyntaxError
hex_plus!SyntaxError
bare_0x!SyntaxError
legacy_octal=17n
fraction!SyntaxError
trailing_dot!SyntaxError
leading_dot!SyntaxError
exponent!SyntaxError
exponent_upper!SyntaxError
separator!SyntaxError
bigint_suffix!SyntaxError
infinity!SyntaxError
neg_infinity!SyntaxError
nan_string!SyntaxError
num_int=10n
num_neg=-10n
num_zero=0n
num_negzero=0n
num_fraction!RangeError
num_tiny_fraction!RangeError
num_nan!RangeError
num_infinity!RangeError
num_neg_infinity!RangeError
num_2pow53=9007199254740992n
num_2pow53_plus1_literal=9007199254740992n
num_1e21=1000000000000000000000n
num_max_value=179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368n
num_min_value!RangeError
true=1n
false=0n
null!TypeError
undefined!TypeError
symbol!TypeError
bigint_itself=7n
empty_array=0n
array_one=15n
array_two!SyntaxError
array_nested=7n
plain_object!SyntaxError
valueof_num=7n
valueof_frac!RangeError
valueof_string=16n
tostring_only=42n
number_wrapper=9n
string_wrapper=9n
bigint_wrapper=9n
new_BigInt!TypeError
BigInt_length=1
BigInt_name=BigInt
has_prototype=object
proto_tag=BigInt
asIntN_length=2
asUintN_length=2

RTS output:

plain=10n
padded=10n
tabbed=10n
empty=0n
blank=0n
nbsp_only=0n
bom_wrapped=10n
plus=10n
minus=-10n
minus_zero=0n
plus_zero=0n
leading_zeros=7n
inner_space=undefinedn
trailing_junk=undefinedn
long=123456789012345678901234567890n
hex_lower=31n
hex_upper=31n
binary=5n
binary_upper=5n
octal=15n
octal_upper=15n
hex_signed=undefinedn
hex_plus=undefinedn
bare_0x=undefinedn
legacy_octal=17n
fraction=undefinedn
trailing_dot=undefinedn
leading_dot=undefinedn
exponent=undefinedn
exponent_upper=undefinedn
separator=undefinedn
bigint_suffix=undefinedn
infinity=undefinedn
neg_infinity=undefinedn
nan_string=undefinedn
num_int=10n
num_neg=-10n
num_zero=0n
num_negzero=0n
num_fraction=undefinedn
num_tiny_fraction=undefinedn
num_nan=undefinedn
num_infinity=undefinedn
num_neg_infinity=undefinedn
num_2pow53=9007199254740992n
num_2pow53_plus1_literal=9007199254740992n
num_1e21=1000000000000000000000n
num_max_value=179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368n
num_min_value=undefinedn
true=1n
false=0n
null=undefinedn
undefined=undefinedn
symbol=undefinedn
bigint_itself=7n
empty_array=undefinedn
array_one=undefinedn
array_two=undefinedn
array_nested=undefinedn
plain_object=undefinedn
valueof_num=undefinedn
valueof_frac=undefinedn
valueof_string=undefinedn
tostring_only=undefinedn
number_wrapper=undefinedn
string_wrapper=undefinedn
bigint_wrapper=undefinedn
new_BigInt=undefined
BigInt_length=1
BigInt_name=BigInt
has_prototype=object
proto_tag=BigInt
asIntN_length=2
asUintN_length=2

claude-bigint-division-shifts-and-bitwise — rts_diverge

Bun output:

div_pp=3
div_np=-3
div_pn=-3
div_nn=3
div_exact=2
div_smaller=0
div_smaller_neg=0
div_huge=142857142857142857142857142857
mod_pp=1
mod_np=-1
mod_pn=1
mod_nn=-1
mod_exact=0
mod_smaller=1
identity=-7
div_by_zero!RangeError
mod_by_zero!RangeError
zero_div_zero!RangeError
zero_div_one=0
neg_zero_literal=0
neg_zero_is_zero=true
pow=1024
pow_zero=1
pow_neg_base_odd=-8
pow_neg_base_even=16
pow_neg_exp!RangeError
pow_zero_neg_exp!RangeError
pow_one_neg_exp!RangeError
pow_big=18446744073709551616
shl=256
shl_big=1267650600228229401496703205376
shl_neg_count=2
shr=16
shr_neg_count=256
shr_to_zero=0
shr_neg_value=-1
shr_neg_value2=-3
shr_neg_far=-1
shr_pos_far=0
shl_neg_value=-8
ushr!TypeError
not_5=-6
not_neg1=0
not_0=-1
and_neg=255
and_neg_neg=-2
or_neg=-1
xor_self_neg=0
xor_neg=-6
and_big=0
or_big=1267650600228229401496703205377
asIntN_0=0
asUintN_0=0
asIntN_1_of_1=-1
asIntN_1_of_0=0
asIntN_1_of_neg1=-1
asUintN_1_of_3=1
asUintN_1_of_neg1=1
asIntN_3_of_7=-1
asIntN_3_of_4=-4
asUintN_3_of_neg1=7
asIntN_64_wrap=-9223372036854775808
asUintN_64_wrap=18446744073709551615
asIntN_neg_width!RangeError
asIntN_frac_width=-1
asIntN_string_width=-1
asIntN_number_value!TypeError

Node output:

div_pp=3
div_np=-3
div_pn=-3
div_nn=3
div_exact=2
div_smaller=0
div_smaller_neg=0
div_huge=142857142857142857142857142857
mod_pp=1
mod_np=-1
mod_pn=1
mod_nn=-1
mod_exact=0
mod_smaller=1
identity=-7
div_by_zero!RangeError
mod_by_zero!RangeError
zero_div_zero!RangeError
zero_div_one=0
neg_zero_literal=0
neg_zero_is_zero=true
pow=1024
pow_zero=1
pow_neg_base_odd=-8
pow_neg_base_even=16
pow_neg_exp!RangeError
pow_zero_neg_exp!RangeError
pow_one_neg_exp!RangeError
pow_big=18446744073709551616
shl=256
shl_big=1267650600228229401496703205376
shl_neg_count=2
shr=16
shr_neg_count=256
shr_to_zero=0
shr_neg_value=-1
shr_neg_value2=-3
shr_neg_far=-1
shr_pos_far=0
shl_neg_value=-8
ushr!TypeError
not_5=-6
not_neg1=0
not_0=-1
and_neg=255
and_neg_neg=-2
or_neg=-1
xor_self_neg=0
xor_neg=-6
and_big=0
or_big=1267650600228229401496703205377
asIntN_0=0
asUintN_0=0
asIntN_1_of_1=-1
asIntN_1_of_0=0
asIntN_1_of_neg1=-1
asUintN_1_of_3=1
asUintN_1_of_neg1=1
asIntN_3_of_7=-1
asIntN_3_of_4=-4
asUintN_3_of_neg1=7
asIntN_64_wrap=-9223372036854775808
asUintN_64_wrap=18446744073709551615
asIntN_neg_width!RangeError
asIntN_frac_width=-1
asIntN_string_width=-1
asIntN_number_value!TypeError

RTS output:

div_pp=3
div_np=-3
div_pn=-3
div_nn=3
div_exact=2
div_smaller=0
div_smaller_neg=0
div_huge=142857142857142857142857142857
mod_pp=1
mod_np=-1
mod_pn=1
mod_nn=-1
mod_exact=0
mod_smaller=1
identity=-7
div_by_zero!RangeError
mod_by_zero!RangeError
zero_div_zero!RangeError
zero_div_one=0
neg_zero_literal=0
neg_zero_is_zero=false
pow=1024
pow_zero=1
pow_neg_base_odd=-8
pow_neg_base_even=16
pow_neg_exp!RangeError
pow_zero_neg_exp!RangeError
pow_one_neg_exp!RangeError
pow_big=18446744073709551616
shl=256
shl_big=1267650600228229401496703205376
shl_neg_count=2
shr=16
shr_neg_count=256
shr_to_zero=0
shr_neg_value=-1
shr_neg_value2=-3
shr_neg_far=-1
shr_pos_far=0
shl_neg_value=-8
ushr=0
not_5=-6
not_neg1=0
not_0=-1
and_neg=255
and_neg_neg=-2
or_neg=-1
xor_self_neg=0
xor_neg=-6
and_big=0
or_big=1267650600228229401496703205377
asIntN_0=0
asUintN_0=0
asIntN_1_of_1=-1
asIntN_1_of_0=0
asIntN_1_of_neg1=-1
asUintN_1_of_3=1
asUintN_1_of_neg1=1
asIntN_3_of_7=-1
asIntN_3_of_4=-4
asUintN_3_of_neg1=7
asIntN_64_wrap=-9223372036854775808
asUintN_64_wrap=18446744073709551615
asIntN_neg_width!RangeError
asIntN_frac_width=-1
asIntN_string_width=-1
asIntN_number_value=undefined

claude-bigint-json-sort-and-stringify — rts_diverge

Bun output:

bare!TypeError
in_object!TypeError
in_array!TypeError
nested!TypeError
wrapper!TypeError
as_key={"1":2}
zero!TypeError
replacer={"a":"1","b":2}
replacer_number={"a":5}
replacer_sees_bigint=object,bigint
own_toJSON={"a":"one"}
--- parse ---
parsed_typeof=number
parsed_value=1.2345678901234568e+29
parsed_lost=9007199254740992
parsed_collides=true
reviver_sees=number
--- sort ---
default=-1,0,1,10,100,2,9
numeric=-1,0,1,2,9,10,100
mixed_default=1,10,2,9
toSorted=-1,0,1,10,100,2,9
comparator_returning_bigint!TypeError
--- stringification ---
String=1234567890123456789012345
template=-42
concat=v=42
join=1-2-3
array_toString=1,2
Array_from_map=2,4
toStringTag=BigInt
keys_of_object=1,2
--- toJSON escape hatch ---
with_toJSON_bare="1"
with_toJSON_object={"a":"1","b":["2"]}
with_toJSON_wrapper="3"
after_delete!TypeError
toJSON_gone=false

Node output:

bare!TypeError
in_object!TypeError
in_array!TypeError
nested!TypeError
wrapper!TypeError
as_key={"1":2}
zero!TypeError
replacer={"a":"1","b":2}
replacer_number={"a":5}
replacer_sees_bigint=object,bigint
own_toJSON={"a":"one"}
--- parse ---
parsed_typeof=number
parsed_value=1.2345678901234568e+29
parsed_lost=9007199254740992
parsed_collides=true
reviver_sees=number
--- sort ---
default=-1,0,1,10,100,2,9
numeric=-1,0,1,2,9,10,100
mixed_default=1,10,2,9
toSorted=-1,0,1,10,100,2,9
comparator_returning_bigint!TypeError
--- stringification ---
String=1234567890123456789012345
template=-42
concat=v=42
join=1-2-3
array_toString=1,2
Array_from_map=2,4
toStringTag=BigInt
keys_of_object=1,2
--- toJSON escape hatch ---
with_toJSON_bare="1"
with_toJSON_object={"a":"1","b":["2"]}
with_toJSON_wrapper="3"
after_delete!TypeError
toJSON_gone=false

RTS output:

bare!TypeError
in_object!TypeError
in_array!TypeError
nested!TypeError
wrapper!TypeError
as_key={"1":2}
zero!TypeError
replacer={"a":"1","b":2}
replacer_number={"a":5}
replacer_sees_bigint=object,bigint
own_toJSON={"a":"one"}
--- parse ---
parsed_typeof=number
parsed_value=1.2345678901234568e+29
parsed_lost=9007199254740992
parsed_collides=true
reviver_sees=number
--- sort ---
default=-1,0,1,10,100,2,9
numeric=-1,0,1,2,9,10,100
mixed_default=1,10,2,9
toSorted=-1,0,1,10,100,2,9
comparator_returning_bigint!TypeError
--- stringification ---
String=1234567890123456789012345
template=-42
concat=v=42
join=1-2-3
array_toString=1,2
Array_from_map=2,4
toStringTag=BigInt
keys_of_object=1,2
--- toJSON escape hatch ---
with_toJSON_bare="1"
with_toJSON_object={"a":"1","b":["2"]}
with_toJSON_wrapper=undefined
after_delete!TypeError
toJSON_gone=false

220 additional divergences are available in the uploaded workflow artifact.

MarcosBrendonDePaula and others added 3 commits September 25, 2026 17:59

wip(dom): wave 4 — nowrap per inline, Headers on fetch, layer-8 splic…

26d5d71

…e — squashed in the PR

wip(dom): wave 4 with both regression fixes — squashed in the PR

6093006

MarcosBrendonDePaula merged commit 6aeefdb into main Sep 25, 2026

MarcosBrendonDePaula deleted the feat/dom-wave-4 branch September 25, 2026 22:12

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feat(dom): nowrap per inline, Appendix E layer 8 in tree order, real Headers on fetch - #2764

feat(dom): nowrap per inline, Appendix E layer 8 in tree order, real Headers on fetch#2764
MarcosBrendonDePaula merged 3 commits into
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feat/dom-wave-4

MarcosBrendonDePaula commented Sep 25, 2026

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MarcosBrendonDePaula commented Sep 25, 2026

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github-actions Bot commented Sep 25, 2026

Cross-runtime parity (RTS vs Bun vs Node)

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