Started with r11 between 20201018 and 20201108,
and file gcc.dg/tree-ssa/pr77644.c :


$ g++-13-20220703 -c pr77644.c -ftrack-macro-expansion=0 -fdiagnostics-generate-patch
pr77644.c: In function 'int f_f1(float, float)':
pr77644.c:22:1: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   22 | GEN_FOO(float, f)
      | ^~~~~~~
pr77644.c:22:1: note: remove parentheses to default-initialize a variable
   22 | GEN_FOO(float, f)
      | ^~~~~~~
      | -------
pr77644.c:22:1: note: or replace parentheses with braces to value-initialize a variable
pr77644.c: In function 'int f_f2(float, float)':
pr77644.c:22:1: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
pr77644.c:22:1: note: remove parentheses to default-initialize a variable
   22 | GEN_FOO(float, f)
      | ^~~~~~~
      | -------

pr77644.c:22:1: internal compiler error: in apply_fixit, at edit-context.cc:769
0x1b6c4f0 edited_line::apply_fixit(int, int, char const*, int)
        ../../gcc/edit-context.cc:769
0x1b6d306 edit_context::add_fixits(rich_location*)
        ../../gcc/edit-context.cc:232
0x1b60344 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
        ../../gcc/diagnostic.cc:1580
0x1b6069a diagnostic_impl
        ../../gcc/diagnostic.cc:1712
0x1b61f89 inform(rich_location*, char const*, ...)
        ../../gcc/diagnostic.cc:1804
0x7ddf27 warn_about_ambiguous_parse
        ../../gcc/cp/parser.cc:22338
0x81e50a cp_parser_init_declarator
        ../../gcc/cp/parser.cc:22618
0x7fbb82 cp_parser_simple_declaration
        ../../gcc/cp/parser.cc:15336
0x7fd429 cp_parser_declaration_statement
        ../../gcc/cp/parser.cc:14417
0x7fda0b cp_parser_statement
        ../../gcc/cp/parser.cc:12494
0x7fe9d4 cp_parser_statement_seq_opt
        ../../gcc/cp/parser.cc:12906
0x7fea8f cp_parser_compound_statement
        ../../gcc/cp/parser.cc:12858
0x81d5e8 cp_parser_function_body
        ../../gcc/cp/parser.cc:25205
0x81d5e8 cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc/cp/parser.cc:25256
0x81daa6 cp_parser_function_definition_after_declarator
        ../../gcc/cp/parser.cc:31404
0x81ec29 cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc/cp/parser.cc:31321
0x81ec29 cp_parser_init_declarator
        ../../gcc/cp/parser.cc:22658
0x7fbb82 cp_parser_simple_declaration
        ../../gcc/cp/parser.cc:15336
0x824958 cp_parser_declaration
        ../../gcc/cp/parser.cc:15022
0x825232 cp_parser_translation_unit
        ../../gcc/cp/parser.cc:5018