https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88945 Bug 88945 depends on bug 89779, which changed state.
Bug 89779 Summary: [9 Regression] internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in tree_nop_conversion_p, at tree.c:12798 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89779 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED