[Bug c++/101065] New: "internal compiler error: Segmentation fault signal terminated program cc1plus" when compiling some malformed code

[786246442 at qq dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101065

            Bug ID: 101065
           Summary: "internal compiler error: Segmentation fault signal
                    terminated program cc1plus" when compiling some
                    malformed code
           Product: gcc
           Version: 10.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: 786246442 at qq dot com
  Target Milestone: ---

A minified example is:
```
class A {public: class B;};
class C {public: typedef ::A A;
class A::B {};
```

Expected: g++ will return where the error in the code is
Actual:
g++: internal compiler error: Segmentation fault signal terminated program
cc1plus
Please submit a full bug report,
with preprocessed source if appropriate.
See <\usr\share\doc\gcc-10\README.Bugs> for instructions.