https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84297
Bug ID: 84297 Summary: ICE (mmap: Invalid argument) in std::is_trivially_constructible Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: smw at gcc dot gnu.org Target Milestone: --- I expected a diagnostic, but not this one. #include <type_traits> struct S { }; std::is_trivially_constructible<S, int&()> boom; Fed to any verison of GCC, I get something like the following. In file included from <source>:1: /opt/compiler-explorer/gcc-trunk-20180208/include/c++/8.0.1/type_traits: In instantiation of 'struct std::is_trivially_constructible<S, int&()>': <source>:5:48: required from here /opt/compiler-explorer/gcc-trunk-20180208/include/c++/8.0.1/type_traits:1150:12: internal compiler error: tree check: did not expect class 'type', have 'type' (function_type) in convert_from_reference, at cp/cvt.c:548 struct is_trivially_constructible ^~~~~~~~~~~~~~~~~~~~~~~~~~ mmap: Invalid argument Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. Compiler returned: 1