[llvm-bugs] [Bug 44292] New: Parser crash

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44292

            Bug ID: 44292
           Summary: Parser crash
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: W1RPUJQXS5D0SRW18WKS6EZ4HKORNX at cmx.ietfng.org
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

This fragment of a program

    // RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu -disable-free
-main-file-name OutputSections.cpp -fmath-errno -masm-verbose -U NDEBUG
-pedantic -fdeprecated-macro -ferror-limit 19 -fmessage-length 0
-fvisibility-inlines-hidden -fno-signed-char -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o - -emit-llvm -O0
-Wimplicit-int  %s
    template <typename> class a;
    b() {          a< char >::append(

is, of course, invalid, but triggers after diagnostic reporting:

    clang: /cheri/source/llvm-project/clang/lib/Parse/ParseExprCXX.cpp:585:
clang::ExprResult clang::Parser::tryParseCXXIdExpression(clang::CXXScopeSpec &,
bool, clang::Token &): Assertion `SS.isEmpty() && "undeclared non-type
annotation should be unqualified"' failed.

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