https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101364
Bug ID: 101364
Summary: [12 Regression] ICE: tree check: expected class
‘type’, have ‘exceptional’ (error_mark) in
c_type_promotes_to, at c/c-typeck.c:278
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: anbu1024.me at gmail dot com
Target Milestone: ---
$ cat test.c
void fruit();
struct Apple{
int apple[4];
};
void fruit(
struct Apple a,
int b[x],
unsigned char c)
{
return 0;
}
================================
$ gcc-sp12 --version
gcc (GCC) 12.0.0 20210704 (experimental)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
================================
$ gcc-sp12 test.c
test.c:10:11: error: ‘x’ undeclared here (not in a function)
10 | int b[x],
| ^
test.c:8:6: error: conflicting types for ‘fruit’; have ‘void(struct Apple,
<type-error>, unsigned char)’
8 | void fruit(
| ^~~~~
test.c:12:1: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in c_type_promotes_to, at c/c-typeck.c:278
12 | {
| ^
0x7ad81c tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc-12-20210704/gcc/tree.c:8734
0x668e82 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../gcc-12-20210704/gcc/tree.h:3496
0x668e82 c_type_promotes_to(tree_node*)
../../gcc-12-20210704/gcc/c/c-typeck.c:278
0x874d07 diagnose_arglist_conflict
../../gcc-12-20210704/gcc/c/c-decl.c:1826
0x874d07 diagnose_mismatched_decls
../../gcc-12-20210704/gcc/c/c-decl.c:2134
0x8767e4 duplicate_decls
../../gcc-12-20210704/gcc/c/c-decl.c:2956
0x8791a9 pushdecl(tree_node*)
../../gcc-12-20210704/gcc/c/c-decl.c:3149
0x88c359 start_function(c_declspecs*, c_declarator*, tree_node*)
../../gcc-12-20210704/gcc/c/c-decl.c:9642
0x8ea09e c_parser_declaration_or_fndef
../../gcc-12-20210704/gcc/c/c-parser.c:2440
0x8f2983 c_parser_external_declaration
../../gcc-12-20210704/gcc/c/c-parser.c:1777
0x8f33c9 c_parser_translation_unit
../../gcc-12-20210704/gcc/c/c-parser.c:1650
0x8f33c9 c_parse_file()
../../gcc-12-20210704/gcc/c/c-parser.c:22121
0x952ead c_common_parse_file()
../../gcc-12-20210704/gcc/c-family/c-opts.c:1219
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
================================
$ gcc-sp11 --version
gcc (GCC) 11.1.1 20210703
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
================================
$ gcc-sp11 test.c
test.c:10:11: error: ‘x’ undeclared here (not in a function)
10 | int b[x],
| ^
test.c:8:6: error: conflicting types for ‘fruit’; have ‘void(struct Apple,
<type-error>, unsigned char)’
8 | void fruit(
| ^~~~~
test.c:12:1: note: an argument type that has a default promotion cannot match
an empty parameter name list declaration
12 | {
| ^
test.c:2:6: note: previous declaration of ‘fruit’ with type ‘void()’
2 | void fruit();
| ^~~~~
test.c: In function ‘fruit’:
test.c:13:10: warning: ‘return’ with a value, in function returning void
13 | return 0;
| ^
test.c:8:6: note: declared here
8 | void fruit(
| ^~~~~
