Just an FYI. leafhopper / snakefly (both aarch64) have been failing to build HEAD since yesterday. Both are on gcc-experimental, although alligator (which also is on latest gcc, but an x86_64), is able to build postgres successfully.
The signature seems to match an existing GCC bug and I've updated the thread in hopes that it gets fixed sooner. Ideally these failures should auto-fix in the coming days.