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ffmpeg_4: fix crash with clang 16#253704

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Mindavi merged 1 commit intoNixOS:stagingfrom
reckenrode:ffmpeg_4-fix
Sep 7, 2023
Merged

ffmpeg_4: fix crash with clang 16#253704
Mindavi merged 1 commit intoNixOS:stagingfrom
reckenrode:ffmpeg_4-fix

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Description of changes

ffmpeg_4 crashes in ff_seek_frame_binary due to UB and optimizations clang 16 performs. This is fixed upstream in ffmpeg_5, but the patch can be made to apply to ffmpeg_4.

ffmpeg_4’s tests successfully passed on Darwin with clang 16 from #241692.

Things done

  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
  • For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
  • Tested, as applicable:
  • Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
  • Tested basic functionality of all binary files (usually in ./result/bin/)
  • 23.11 Release Notes (or backporting 23.05 Release notes)
    • (Package updates) Added a release notes entry if the change is major or breaking
    • (Module updates) Added a release notes entry if the change is significant
    • (Module addition) Added a release notes entry if adding a new NixOS module
  • Fits CONTRIBUTING.md.

ffmpeg_4 crashes in `ff_seek_frame_binary` due to UB and optimizations
clang 16 performs. This is fixed upstream in ffmpeg_5, but the patch can
be made to apply to ffmpeg_4.
@ofborg ofborg bot added 10.rebuild-darwin: 101-500 This PR causes between 101 and 500 packages to rebuild on Darwin. 10.rebuild-linux: 501+ This PR causes many rebuilds on Linux and should normally target the staging branches. 10.rebuild-linux: 1001-2500 This PR causes many rebuilds on Linux and should target the staging branches. labels Sep 6, 2023
@reckenrode reckenrode changed the base branch from master to staging September 7, 2023 02:50
@Mindavi Mindavi merged commit 25a68e5 into NixOS:staging Sep 7, 2023
@reckenrode reckenrode deleted the ffmpeg_4-fix branch January 10, 2025 14:17
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10.rebuild-darwin: 101-500 This PR causes between 101 and 500 packages to rebuild on Darwin. 10.rebuild-linux: 501+ This PR causes many rebuilds on Linux and should normally target the staging branches. 10.rebuild-linux: 1001-2500 This PR causes many rebuilds on Linux and should target the staging branches.

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2 participants