Fails to build ninja with mold linker on gcc15

[blackteahamburger]

build.log
emerge-info-output.log
Ref: https://bugs.gentoo.org/938659

Without -fuse-ld=mold build succeeds.

Edit: gdb.txt

[rui314]

Thank you for your report. GCC 15 is not released yet, no? If that's the case, it might be a bug that is in the development branch. You may want to report it to GCC.

[jwakely]

The build.log seems to show that the python configure.py step fails, but the logs don't show any information about why, except that ninja trapped.

There is nothing useful here that can be reported as a GCC bug, and a gentoo toolchain dev is unable to reproduce this.

Please rebuild with -g3, ulimit -c unlimited, and check coredumpctl

[blackteahamburger]

I recompiled it using gcc-14 but it still failed. It never failed before. My gcc-14 and mold are built on gcc-15.

[rui314]

Is there any possibility that gcc 15 miscompiled mold? Overall, it looks more like an issue with the gcc dev branch rather than a mold issue.

[blackteahamburger]

It seems that gcc 15 has broken too many things. I don't want to move further because I have reinstalled my system.