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Date: Thu, 20 Aug 2026 12:12:26 +0000
To: submit@bugs.debian.org
From: =?utf-8?Q?Juan_Manuel_M=C3=A9ndez_Rey?= <juan.mendezr@proton.me>
Subject: rust-swc-core: FTBFS: wrong [[test]] name in
 swc_css_prefixer/Cargo.toml (expects tests/fixture.rs,
 actual file is tests/prefixer.rs)
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Package: rust-swc-core
Version: 65.0.4+ds-4
Severity: serious
Justification: fails to build from source
X-Debbugs-Cc: dr@jones.dk

65.0.4+ds-4 FTBFS on all architectures (confirmed via buildd.debian.org,
attempted 2026-08-20, arch 'all'):

  error: failed to parse manifest at
  `/build/reproducible-path/rust-swc-core-65.0.4+ds/crates/swc_css_prefixer=
/Cargo.toml`

  Caused by:
    can't find `fixture` test at `tests/fixture.rs` or
    `tests/fixture/main.rs`. Please specify test.path if you want to use a
    non-default path.
  dh_auto_test: error: /usr/share/dh-rust/bin/cargo test returned exit code=
 101

Root cause: debian/patches/2005_avoid_crate_testing.patch adds this stanza =
to
crates/swc_css_prefixer/Cargo.toml:

  [[test]]
  name =3D "fixture"
  required-features =3D ["testing"]

but swc_css_prefixer's actual test file is tests/prefixer.rs, not
tests/fixture.rs (the crate ships no tests/fixture.rs or tests/fixture/
directory containing main.rs). Cargo therefore fails to even parse the
manifest, which aborts the whole `cargo test` invocation for the workspace
and fails binary-indep for the entire source package, not just this crate.

The fix looks like a one-line name mismatch =E2=80=94 the intent (matching =
the same
pattern applied to the other crates in that patch) was presumably to gate t=
he
crate's existing auto-discovered test behind the "testing" feature. Since
cargo auto-discovers tests/*.rs and names the target after the file stem, t=
he
stanza should read:

  [[test]]
  name =3D "prefixer"
  required-features =3D ["testing"]

(or alternatively keep name =3D "fixture" but add an explicit
`path =3D "tests/prefixer.rs"`).

Full build log:
https://buildd.debian.org/status/fetch.php?pkg=3Drust-swc-core&arch=3Dall&v=
er=3D65.0.4%2Bds-4&stamp=3D1786554841&raw=3D1
]