Bug#1129972: Bug#1123400: jpeg-xl: FTBFS: The following tests FAILED: 5457 - SplinesTest.Drawing (ILLEGAL)

[Simon McVittie]

Control: retitle 1123400: jpeg-xl: FTBFS with libjxl-testdata 20250513: test fails with SIGILL
Control: tags 1123400 + ftbfs patch fixed-upstream
Control: tags 1129972 + ftbfs patch fixed-upstream

On Tue, 16 Dec 2025 at 20:27:21 +0000, Santiago Vila wrote:
>The following tests FAILED:
>	5457 - SplinesTest.Drawing (ILLEGAL)

On Wed, 17 Dec 2025 at 08:02:45 +0100, Mathieu Malaterre wrote:
>forwarded 1123400 https://github.com/libjxl/libjxl/issues/4544

This appears to be the same incompatibility between current jpeg-xl and 
newer libjxl-testdata that was previously reported as an autopkgtest 
regression in #1129972. According to messages from Vladimir Petko, it 
can be resolved by updating jpeg-xl to upstream release 0.11.2 or by 
cherry-picking a patch from that release 
(https://salsa.debian.org/debian-phototools-team/libjxl/-/merge_requests/12).

I'm not sure why libjxl-testdata was updated to a new upstream release 
without a coordinated upload of jpeg-xl? It doesn't seem to have any 
purpose other than testing jpeg-xl.

     smcv