https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109385
Bug ID: 109385 Summary: decltype in lambda causes internal compiler error Product: gcc Version: 12.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: stevenxia990430 at gmail dot com Target Milestone: --- The following program reports an internal compiler error: Segmentation fault To quickly reproduce: https://gcc.godbolt.org/z/WPWjs116W ``` #include <vector> #include <algorithm> int main() { auto sort_fn = [](auto... vals) { return [=]() { decltype(vals) vec; }(); }; auto result = sort_fn(); } ``` Removing the decltype(vals) inside the lambda removes the internal compiler error. This crash seems to happen after and including gcc 8.1 to gcc 12.2