https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100109
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[8/9/10/11/12 Regression] |[8/9/10/11 Regression] ICE: |ICE: unexpected expression |unexpected expression 'E' |'E' of kind |of kind template_parm_index |template_parm_index | --- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> --- Fixed for 12 so far.