29037868808
47%

Ran 09 Jul 2026 05:43PM UTC

Jobs 1

Files 25

Run time 1min

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Committed 09 Jul 2026 05:39PM UTC coverage: 46.641%. Remained the same

Build # 29037868808

Build Type

push

github

Committed by

zommiommy

Commit Message

fix: define MAGIC with a fixed byte order so the endianness marker works

MAGIC was u64::from_ne_bytes(*b"epserde "), so the constant itself was
endian-dependent and the native-order serialization cancelled it out:
every platform wrote the same eight bytes and read them back as its own
MAGIC. Real cross-endian files therefore never hit EndiannessMismatch
and were misreported as MajorVersionMismatch; the MAGIC_REV arm was
unreachable for genuinely produced files.

Pinning MAGIC to from_le_bytes makes it the same number everywhere, so
the single native conversion at write time becomes the marker: an
opposite-endian reader now sees MAGIC_REV and reports
EndiannessMismatch. On-disk bytes are unchanged on little-endian
platforms; big-endian writers now emit the byte-swapped string, and
files previously written on big-endian platforms are reported as
EndiannessMismatch there.

Also simplify MAGIC_REV to MAGIC.swap_bytes() and document why the
constant must not use from_ne_bytes.

Coverage Stats

986 of 2114 relevant lines covered (46.64%)

563.53 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	29037868808.1	09 Jul 2026 05:43PM UTC	25	46.64	GitHub Action Run

vigna / epserde-rs / 29037868808
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