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From: "nico at josuttis dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/98635] New: ad-hoc requirement without semicolon creates
 internal compiler bug
Date: Tue, 12 Jan 2021 11:07:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98635

            Bug ID: 98635
           Summary: ad-hoc requirement without semicolon creates internal
                    compiler bug
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nico at josuttis dot de
  Target Milestone: ---

https://godbolt.org/z/nPsT7n:

void printColl(auto& coll)
requires requires {
           coll.begin()
         }=20
{
}

yields:

<source>:3:24: error: expected ';' before '}' token
    3 |            coll.begin()
      |                        ^
      |                        ;
    4 |          }
      |          ~=20=20=20=20=20=20=20=20=20=20=20=20=20=20
<source>:4:10: internal compiler error: Segmentation fault
    4 |          }
      |          ^
0x1cc31d9 internal_error(char const*, ...)
        ???:0
0x79a2b6 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
        ???:0
0x79dda6 start_function(cp_decl_specifier_seq*, cp_declarator const*,
tree_node*)
        ???:0
0x8d803d c_parse_file()
        ???:0
0xa54072 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.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1=