internal_error_function in ada/misc.c uses plain vfprintf for formatting the error message, which may contain gcc-specific formatting directives when called through tree_class_check_failed or tree_contains_struct_check_failed.
-- Summary: [Ada] Wrong ICE diagnostic formatting Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: diagnostic Severity: normal Priority: P2 Component: ada AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: schwab at suse dot de CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23717