I couldn't reproduce with 9.1.0 on Arch Linux since it's patched: https://git.archlinux.org/svntogit/packages.git/commit/trunk/bz90949.patch?h=packages/gcc&id=7

I couldn't reproduce with 9.1.0 on Arch Linux since it's patched: https://git.archlinux.org/svntogit/packages.git/commit/trunk/bz90949.patch?h=packages/gcc&id=7c2f84ac385521ffeb9ce7f34cc919031e717392 https://git.archlinux.org/svntogit/packages.git/commit/trunk... However the gcc 9.1.0 in nix/nixos is still affected (but not the default gcc, which is still gcc7). EDIT: nix just updated to gcc 9.2.0. I was using a slightly outdated release: https://github.com/NixOS/nixpkgs/pull/66836 https://github.com/NixOS/nixpkgs/pull/66836