https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107276
Bug ID: 107276
Summary: ICE Deducting return type from ill-formed structured
binding name
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: johelegp at gmail dot com
CC: johelegp at gmail dot com
Target Milestone: ---
See https://compiler-explorer.com/z/6MqKTjKd7.
```C++
auto f(auto x) {
auto [y] = x;
return y;
}
int i = f(0);
```
```
<source>: In instantiation of 'auto f(auto:1) [with auto:1 = int]':
<source>:5:10: required from here
<source>:2:8: error: cannot decompose non-array non-class type 'int'
2 | auto [y] = x;
| ^~~
<source>:3:10: internal compiler error: tree check: expected non_lvalue_expr or
static_cast_expr, have error_mark in set_implicit_rvalue_p, at
cp/cp-tree.h:8688
3 | return y;
| ^
0x236ef7e internal_error(char const*, ...)
???:0
0x95b166 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
???:0
0xc9d1ca do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
???:0
0xd4e054 check_return_expr(tree_node*, bool*)
???:0
0xcf39f3 finish_return_stmt(tree_node*)
???:0
0xcad9e6 instantiate_decl(tree_node*, bool, bool)
???:0
0xb8e015 maybe_instantiate_decl(tree_node*)
???:0
0xb8fa9e mark_used(tree_node*, int)
???:0
0xad275e build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0xcf93c8 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0xc806a7 c_parse_file()
???:0
0xdbdef9 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
```
