I think this is because the patch changes libstdc++-v3/include/bits/version.def which requires version.h to be regenerated, by running 'make update-version' in the objdir/$target/libstdc++-v3/include directory.
The patch I sent to gcc-patches (which is archived in patchwork) doesn't have the updates to the generated files, but what I committed to git does have them.
---------- Forwarded message --------- From: ci_notify@linaro.org Date: Mon, 11 Sept 2023 at 21:00 Subject: [Linaro-TCWG-CI] gcc patch #75644: FAIL: 2 regressions To: jwakely@redhat.com
Dear contributor, our automatic CI has detected problems related to your patch(es). Please find some details below. If you have any questions, please follow up on linaro-toolchain@lists.linaro.org mailing list, Libera's #linaro-tcwg channel, or ping your favourite Linaro toolchain developer on the usual project channel.
In CI config tcwg_gcc_check/master-aarch64 after:
| gcc patch https://patchwork.sourceware.org/patch/75644 | Author: Jonathan Wakely jwakely@redhat.com | Date: Mon Sep 11 14:57:08 2023 +0100 | | libstdc++: Formatting std::thread::id and std::stacktrace (P2693R1) | | Tested aarch64-linux. Pushed to trunk. | | -- >8 -- | | New std::formatter specializations for C++23. | ... 18 lines of the commit log omitted. | ... applied on top of baseline commit: | 390fa3a78c8 libstdc++: Fix -Wunused-parameter warnings
FAIL: 2 regressions
regressions.sum: === libstdc++ tests ===
Running libstdc++:libstdc++-dg/conformance.exp ... FAIL: 19_diagnostics/stacktrace/output.cc (test for excess errors) FAIL: 19_diagnostics/stacktrace/version.cc (test for excess errors)
=== Results Summary ===
You can find the failure logs in *.log.1.xz files in - https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-precommit/2232/arti... . The full lists of regressions and progressions are in - https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-precommit/2232/arti... . The list of [ignored] baseline and flaky failures are in - https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-precommit/2232/arti... .
-----------------8<--------------------------8<--------------------------8<-------------------------- The information below can be used to reproduce a debug environment:
Current build : https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-precommit/2232/arti... Reference build : https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/926/artifact/...