5111
90%

Ran 08 Jul 2026 08:11AM UTC

Jobs 1

Files 383

Run time 1min

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Committed 08 Jul 2026 08:09AM UTC coverage: 91.427% (-0.003%) from 91.43%

Build # 5111

Build Type

push

github

Committed by

bobzhang

Commit Message

Remove negative index support from view/slice operators

The `_[_:_]` slice operator and its sibling `get_view`/`mut_view` APIs
previously normalized negative indices as offsets from the end
(`if x < 0 { len + x }`). This removes that normalization across
String, StringView, Bytes, BytesView, Array, ArrayView, FixedArray and
MutArrayView so a negative index now falls through to the existing
bounds guard and is rejected (panic, or None for `get_view`), matching
the pre-existing behavior of `UninitializedArray::sub`.

Tests asserting negative-index view results are removed or converted to
equivalent positive indices; "panic negative index" tests are retained
and now verify that negatives are rejected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Coverage Stats

15548 of 17006 relevant lines covered (91.43%)

193334.15 hits per line

Coverage Regressions

Lines	Coverage	∆	File
12	81.13	-0.69%	builtin/bytesview.mbt
3	98.76	-0.03%	builtin/arrayview.mbt
1	98.21	-0.12%	builtin/mutarrayview.mbt
1	99.47	0.5%	builtin/stringview.mbt

Jobs

ID	Job ID	Ran	Files	Coverage
1	5111.1	08 Jul 2026 08:11AM UTC	384	91.44	GitHub Action Run

moonbitlang / core / 5111
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