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[ui] Use --diagnostic-width=100 in UI tests#3241

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ksapru wants to merge 3 commits intogoogle:mainfrom
ksapru:use-diagnostic-flag
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[ui] Use --diagnostic-width=100 in UI tests#3241
ksapru wants to merge 3 commits intogoogle:mainfrom
ksapru:use-diagnostic-flag

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@ksapru
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@ksapru ksapru commented Apr 12, 2026

Pass --diagnostic-width=100 to rustc in UI tests to ensure consistent error message line-wrapping regardless of the terminal width of the environment in which the tests are run.

The flag is skipped for the 'msrv' toolchain (Rust 1.56.0) since it was only stabilized in Rust 1.70.0.

The TERM/COLUMNS environment variables are retained since they can still influence other tools, but a comment is updated to clarify that --diagnostic-width is now the primary and more reliable mechanism.

Fixes #3113

Pass --diagnostic-width=100 to rustc in UI tests to ensure consistent
error message line-wrapping regardless of the terminal width of the
environment in which the tests are run.

The flag is skipped for the 'msrv' toolchain (Rust 1.56.0) since it was
only stabilized in Rust 1.70.0.

The TERM/COLUMNS environment variables are retained since they can still
influence other tools, but a comment is updated to clarify that
--diagnostic-width is now the primary and more reliable mechanism.

Fixes google#3113
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google-cla bot commented Apr 12, 2026

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

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codecov-commenter commented Apr 12, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.88%. Comparing base (5cd3582) to head (357bc98).

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #3241   +/-   ##
=======================================
  Coverage   91.88%   91.88%           
=======================================
  Files          20       20           
  Lines        6076     6076           
=======================================
  Hits         5583     5583           
  Misses        493      493           

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@ksapru
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ksapru commented Apr 12, 2026

@joshlf CI Docker cache failure is a fork permissions issue (403 on ghcr.io write). Happy to address any code review feedback!

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2 participants