6142
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Ran 18 Aug 2026 02:08AM UTC

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Run time 1min

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Committed 18 Aug 2026 02:04AM UTC coverage: 90.859%. Remained the same

Build # 6142

Build Type

push

github

Committed by

bobzhang

Commit Message

test(builtin): document physical_equal's NaN behavior across backends

`physical_equal` is `%refeq`, which on an unboxed float lowers to an
IEEE-754 value comparison. NaN therefore drags its own non-reflexivity
into it: `physical_equal(nan, nan)` is `false` even when both arguments
are literally the same binding, and NaNs with different bit patterns are
indistinguishable from NaNs with the same one. Boxing restores
reflexivity, because the comparison then never reaches the float.

None of this was written down anywhere, and none of it is guaranteed --
`physical_equal` is documented as a performance hint whose result may
vary by backend and optimization level. So these tests document rather
than specify: they pin the current answers so a backend change shows up
as a visible diff instead of a silent one, and the file header says as
much.

Verified on all four targets (native, js, wasm, wasm-gc). Every case
agrees across all of them, so no per-target expectations or
`options(targets:)` entries are needed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Coverage Stats

16192 of 17821 relevant lines covered (90.86%)

333265.02 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	6142.1	18 Aug 2026 02:08AM UTC	445	90.87	GitHub Action Run

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