https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103415
Bug ID: 103415
Summary: [12 Regression] ICE in cpp_interpret_string_1, at
libcpp/charset.c:1739
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Started between 20210808 and 20210822 :
$ cat z1.c
#define n(x...) = #__VA_OPT__(x##1)
const char *c n(1, 2);
$ gcc-12-20211121 -c z1.c
z1.c:1:20: warning: __VA_OPT__ can only appear in the expansion of a C++20
variadic macro
1 | #define n(x...) = #__VA_OPT__(x##1)
| ^
z1.c:2:1: internal compiler error: in cpp_interpret_string_1, at
libcpp/charset.c:1739
2 | const char *c n(1, 2);
| ^~~~~
0x18b9877 cpp_interpret_string_1
../../libcpp/charset.c:1739
0x18b9aed cpp_interpret_string(cpp_reader*, cpp_string const*, unsigned long,
cpp_string*, cpp_ttype)
../../libcpp/charset.c:1819
0x78aad3 c_parser_string_literal(c_parser*, bool, bool)
../../gcc/c/c-parser.c:7410
0x78b528 c_parser_postfix_expression
../../gcc/c/c-parser.c:9023
0x795b12 c_parser_unary_expression
../../gcc/c/c-parser.c:8255
0x796b5f c_parser_cast_expression
../../gcc/c/c-parser.c:8097
0x796e19 c_parser_binary_expression
../../gcc/c/c-parser.c:7900
0x79800b c_parser_conditional_expression
../../gcc/c/c-parser.c:7600
0x7986d1 c_parser_expr_no_commas
../../gcc/c/c-parser.c:7515
0x79eaf9 c_parser_initializer
../../gcc/c/c-parser.c:5212
0x7aef2a c_parser_declaration_or_fndef
../../gcc/c/c-parser.c:2282
0x7b70cf c_parser_external_declaration
../../gcc/c/c-parser.c:1780
0x7b79fb c_parser_translation_unit
../../gcc/c/c-parser.c:1653
0x7b79fb c_parse_file()
../../gcc/c/c-parser.c:23280
0x808eb2 c_common_parse_file()
../../gcc/c-family/c-opts.c:1240
