https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100172
--- Comment #2 from 康桓瑋 <hewillk at gmail dot com> --- The struct bit is a red herring. It can be boiled down to just two concept keywords: https://godbolt.org/z/sW7vr3sso concept concept; <source>:1:1: warning: C++20 concept definition syntax is 'concept <name> = <expr>' 1 | concept concept; | ^~~~~~~ <source>:1:9: warning: C++20 concept definition syntax is 'concept <name> = <expr>' 1 | concept concept; | ^~~~~~~ ' Segmentation fault 0x1d030c9 internal_error(char const*, ...) ???:0 0x1d1eb4b pp_format(pretty_printer*, text_info*) ???:0 0x1d01c4a diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*) ???:0 0x1d049e6 error_at(rich_location*, char const*, ...) ???:0 0x8e261d c_parse_file() ???:0 0xa62752 c_common_parse_file() ???:0 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report.
