[Bug c++/107854] New: compiler crash when using co_await inside ternary operator

[adrian--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107854

Bug ID: 107854
   Summary: compiler crash when using co_await inside ternary
operator
   Product: gcc
   Version: 13.0
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
  Assignee: unassigned at gcc dot gnu.org
  Reporter: adr...@adi-ware.ch
  Target Milestone: ---

https://godbolt.org/z/n8q4cezvb

```
res notok(bool cond) {
co_return cond ? res{co_await foo_error()} : res{5};
}
```

results in:
```
: In function 'res notok(bool)':
:97:1: internal compiler error: in flatten_await_stmt, at
cp/coroutines.cc:2891
   97 | }
  | ^
0x22f921e internal_error(char const*, ...)
???:0
0xa4d7bc fancy_abort(char const*, int, char const*)
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f57b8 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0x15f4da5 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set >*))
???:0
0xad58e1 morph_fn_to_coro(tree_node*, tree_node**, tree_node**)
???:0
0xb259df finish_function(bool)
???:0
0xc26267 c_parse_file()
???:0
0xd61389 c_common_parse_file()
???:0
```

สินเชื่อsme

[Adrian via Gcc-bugs]

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