https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105692
Bug ID: 105692
Summary: internal compiler error: in finish_expr_stmt, at
cp/semantics.cc:872
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: elmar.braun at web dot de
Target Milestone: ---
Created attachment 53015
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53015&action=edit
output of compiling with -freport-bug
Reduced testcase:
template <typename T>
using lambda = decltype([] {});
template <typename Lambda>
void f3() {}
template <typename T>
void f2() {
f3<lambda<T>>();
}
void f1() {
f2<int>();
}
Compiling this with GCC 12.1.0, using the command line "g++-12.1 -std=c++20
-Wall -Wextra bug.cpp", results in the following error message:
bug.cpp: In instantiation of ‘void f2() [with T = int]’:
bug.cpp:13:10: required from here
bug.cpp:9:3: internal compiler error: in finish_expr_stmt, at
cp/semantics.cc:872
9 | f3<lambda<T>>();
Exact version of GCC, system type, and options given when GCC was configured
can be found in the attached output from -freport-bug.
I was also able to reproduce the issue on godbolt.org
(https://godbolt.org/z/3344WMcWT). Clang 14 and the latest MSVC compile this
code without problems.
