Dear contributor, Our automatic CI has detected problems related to your patch(es). Please find some details below. In armv8l-unknown-linux-gnueabihf native, after: | commit gcc-16-8510-g395e5cef29d | Author: Tomasz Kamiński | Date: Wed Apr 1 14:32:21 2026 +0200 | | libstdc++: Export explicit instantiations for C++20 members of std::string | | The C++20 standard added new starts_with and ends_with members to | std::basic_string, which were not previously instantiated in the library. | This meant that the extern template declarations had to be disabled for | ... 31 lines of the commit log omitted. Produces 1 regression: | | regressions.sum: | Running g++:g++.dg/lto/lto.exp ... | FAIL: g++.dg/lto/20091022-2 cp_lto_20091022-2_0.o-cp_lto_20091022-2_0.o link, -O3 -flto -Winline Used configuration : *CI config* tcwg_gcc_check armv8l-unknown-linux-gnueabihf *configure and test flags:* none, autodetected on armv8l-unknown-linux-gnueabihf--disable-multilib --with-float=hard --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a --with-fpu=neon-fp-armv8 We track this bug report under https://linaro.atlassian.net/browse/GNU-1869. Please let us know if you have a fix. If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list. -----------------8<--------------------------8<--------------------------8<-------------------------- The information below contains the details of the failures, and the ways to reproduce a debug environment: You can find the failure logs in *.log.1.xz files in * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10069/archive/artifacts/00-sumfiles/ The full lists of regressions and improvements as well as configure and make commands are in * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10069/archive/artifacts/notify/ The list of [ignored] baseline and flaky failures are in * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10069/archive/artifacts/sumfiles/xfails.xfail Current build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10069/archive/artifacts/ Reference build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10068/archive/artifacts/ Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/395e5cef29d935052e5ebcab77f068f3596aa1a6/tcwg_gcc_check/master-arm/reproduction_instructions.txt Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git