regression: custom attribute panicked

[BoxyUwU]

• https://crater-reports.s3.amazonaws.com/beta-1.91-2/beta-2025-09-21/gh/into-the-v0id.wg/log.txt

[INFO] [stdout] error: custom attribute panicked
[INFO] [stdout]   --> wg-mail/src/lib.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | / #[message_bundle(
[INFO] [stdout] 24 | |     resources = [
[INFO] [stdout] 25 | |         ("translations/en.ftl", "en"),
[INFO] [stdout] 26 | |         ("translations/de.ftl", "de"),
[INFO] [stdout] 27 | |     ],
[INFO] [stdout] 28 | |     default_language = "en",
[INFO] [stdout] 29 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: `"number<'_>"` is not a valid identifier

[fmease]

"number<'_>" makes me think that someone is parsing the output of type_name which has no stability guarantees whatsoever and which was changed in #145284 to contain lifetime arguments. If my guess is true (90% certainty) then this is a WONTFIX.

[theemathas]

The regressed wg crate depends on fluent-static version 0.5.0. This issue has been fixed in fluent-static version 0.5.1. zaytsev/fluent-static#21

Looking at the PR that fixed the issue, the macro was indeed (and still is) parsing the type_name.

[fmease]

Thanks for the analysis! I've opened into-the-v0id/wg#1 as a heads-up for wg's author to avoid them having to reconstruct on their own what happened (as they're an innocent third-party). We're done here!