https://bugs.kde.org/show_bug.cgi?id=477705
--- Comment #10 from kde3...@a.anjels.de --- Maybe the following information helps reproducing the issue: I checked several toolchain / architecture combinations, and it turned out that only number 4 shows the reported issue: (1) g++ 64bit: OK (2) g++ 32bit: OK (3) clang++ 64bit: OK (4) clang++ 32bit: FAILURE Regarding the conan dependency: I created another CMake project that builds the callgrind_demo app showing the issue. It does not have any conan dependency, but builds fmt from source as part of the project. The contained 'repro.sh' script can be used to trigger the build and callgrind execution of all 4 combinations. (the log from my machine is attached as repro.log) STEPS TO REPRODUCE 1) unzip the attachment bug_477705.zip to ~ 2) ~/bug_477705/repro.sh Regarding the requested gdb output I have attached 2 log files. Regarding the used libstdc++ version: ~/bug_477705/build# ldd ~/bug_477705/build/callgrind_demo/callgrind_demo linux-gate.so.1 (0xf7f4a000) libstdc++.so.6 => /lib/i386-linux-gnu/libstdc++.so.6 (0xf7cf3000) libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf7bee000) libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0xf7bc7000) libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf799f000) /lib/ld-linux.so.2 (0xf7f4c000) My system: - Debian GNU/Linux 12 (bookworm) (in WSL 2) - g++ (Debian 12.2.0-14) 12.2.0 - Debian clang version 14.0.6 (Target: x86_64-pc-linux-gnu) -- You are receiving this mail because: You are watching all bug changes.