https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118061
Bug ID: 118061
Summary: ICE: tree check: expected class 'type', have
'exceptional' (error_mark) in
tagged_types_tu_compatible_p, at c/c-typeck.cc:1946
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: bic60176 at gmail dot com
Target Milestone: ---
Created attachment 59876
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59876&action=edit
testcase
Compiler Explorer: https://godbolt.org/z/e8M85vrEe
console:
<source>: In function 'main':
<source>:4:21: error: lvalue required as increment operand
4 | sizeof(int[1++]);
| ^~
<source>:5:20: error: 'n' undeclared (first use in this function)
5 | typeof(int[n++]);
| ^
<source>:5:20: note: each undeclared identifier is reported only once for each
function it appears in
<source>:5:9: warning: useless type name in empty declaration
5 | typeof(int[n++]);
| ^~~~~~
<source>:6:25: error: lvalue required as increment operand
6 | struct { int x[1++]; };
| ^~
<source>:6:16: warning: unnamed struct/union that defines no instances
6 | struct { int x[1++]; };
| ^
<source>:7:29: error: lvalue required as increment operand
7 | struct foo { int x[1++]; };
| ^~
<source>:8:25: error: lvalue required as increment operand
8 | struct { int x[1++]; } x;
| ^~
<source>:8:16: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in tagged_types_tu_compatible_p, at
c/c-typeck.cc:1946
8 | struct { int x[1++]; } x;
| ^
0x261a125 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x2630ef6 internal_error(char const*, ...)
???:0
0x8f2551 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
???:0
0xa373d7 comptypes_equiv_p(tree_node*, tree_node*)
???:0
0xa2a480 hash_table<c_struct_hasher, false,
xcallocator>::find_slot_with_hash(tree_node* const&, unsigned int,
insert_option)
???:0
0xa26781 finish_struct(unsigned long, tree_node*, tree_node*, tree_node*,
c_struct_parse_info*, tree_node**)
???:0
0xa96748 c_parser_declspecs(c_parser*, c_declspecs*, bool, bool, bool, bool,
bool, bool, bool, c_lookahead_kind)
???:0
0xaabe0e c_parse_file()
???:0
0xb29d69 c_common_parse_file()
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
