1941321 - Thunderbird ccov builds broken with Rust 1.84

Status: RESOLVED FIXED

(Thunderbird :: Testing Infrastructure, defect)

Description

[Kai Engert [:KaiE:]]

Thunderbird ccov builds are broken, same cause that's reported in bug 1938003.

Firefox updated taskcluster builder to rust 1.84
That version is known to break ccov builds, see bug 1924961.

As a workaround, Firefox ccov builds were changed to keep using rust 1.83
see https://phabricator.services.mozilla.com/D233455

I tried the trivial approach to request rust-1.83 in the ccov configuration, see
https://treeherder.mozilla.org/jobs?repo=try-comm-central&revision=edf44cc8a8b18cb026731ab79c066d4b5377f186

But that doesn't work, because the TB rules don't contain the jobs for fetching that rust toolchain, AIUI.
Exception: Missing fetch job for build-linux64-ccov/opt: linux64-rust-1.83

The TB taskcluster rules need additional magic.
Is it necessary to duplicate some of the additional rule files that the Firefox patch changes?

Comment 1

[Kai Engert [:KaiE:]]

Attachment: 1941321-fix-ccov.patch

Patch from Geoff, r=kaie

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/7afac58f63ed
Lock ccov builds to Rust 1.83 because of bug 1938003. r=kaie

Comment 3

[Intermittent Failures Robot]

Summary

2 failures in 4508 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• comm-central: 2

Platform and build breakdown:

• linux64-ccov: 1
  • opt: 1
• windows2012-64: 1
  • ccov: 1

Table

	no_variant
linux64-ccov/-/opt	1
windows2012-64/-/ccov	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1941321&startday=2025-01-13&endday=2025-01-19&tree=all