https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94827
Bug ID: 94827
Summary: [ICE] [regression] crash on requires clause in tparam
list
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric.niebler at gmail dot com
Target Milestone: ---
Try the following code with -std=c++2a
template <typename T,
bool = requires { requires (sizeof(T)==0); } >
void foo(T) {}
The result:
<source>:20:44: internal compiler error: tree check: accessed elt 1 of
'tree_vec' with 0 elts in map_arguments, at cp/constraint.cc:553
20 | bool = requires { requires (sizeof(T)==0); } >
| ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
This compiles with gcc-9 with -std=c++2a -fconcepts, so this is a regression.
