GNU bug report logs - #70822
flymake mishandles GCC diagnostics in en_US.UTF-8 locale

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 70822 <at> debbugs.gnu.org
Subject: bug#70822: flymake mishandles GCC diagnostics in en_US.UTF-8 locale
Date: Tue, 7 May 2024 10:06:59 -0700

In the en_US.UTF-8 locale on Fedora 40, (GCC) 14.0.1 20240411 (Red Hat 
14.0.1-0) uses curved single quotes ‘like this’. This causes Emacs ‘make 
check’ to fail in the flymake tests.

For example, in the C locale 'gcc 
test/lisp/progmodes/flymake-resources/some-problems.h' outputs this:

  test/lisp/progmodes/flymake-resources/some-problems.h:3:1: warning: 
data definition has no type or storage class
      3 | strange;
        | ^~~~~~~
  test/lisp/progmodes/flymake-resources/some-problems.h:3:1: warning: 
type defaults to 'int' in declaration of 'strange' [-Wimplicit-int]
  test/lisp/progmodes/flymake-resources/some-problems.h:7:1: error: 
unknown type name 'sint'; did you mean 'int'?
      7 | sint main();
        | ^~~~
        | int

whereas in the en_US.UTF-8 locale the same command outputs this instead:

  test/lisp/progmodes/flymake-resources/some-problems.h:3:1: warning: 
data definition has no type or storage class
      3 | strange;
        | ^~~~~~~
  test/lisp/progmodes/flymake-resources/some-problems.h:3:1: error: 
type defaults to ‘int’ in declaration of ‘strange’ [-Wimplicit-int]
  test/lisp/progmodes/flymake-resources/some-problems.h:7:1: error: 
unknown type name ‘sint’; did you mean ‘int’?
      7 | sint main();
        | ^~~~
        | int

and flymake mishandles the latter set of diagnostics.

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