https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89583
--- Comment #4 from simon at pushface dot org --- I just ran "make check-gnat" with /Volumes/Miscellaneous1/x86_64/gcc/gcc/gnatmake version 12.0.1 20220311 (experimental) (x86_64-apple-darwin21), with only two fails: FAIL: gnat.dg/bias1.adb scan-assembler DW_AT_GNU_bias FAIL: gnat.dg/debug18.adb scan-assembler-not DW_AT_lower_bound so I think we can close this.