[Bug c/91820] New: missing error diagnosis of '&' in initialization

[tangyixuan at mail dot dlut.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91820

            Bug ID: 91820
           Summary: missing error diagnosis of '&' in initialization
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tangyixuan at mail dot dlut.edu.cn
  Target Milestone: ---

GCC-trunk do not report the error diagnosis when there misses '&' in the
initialization. For example:

$: cat s.c
  static volatile int * volatile * const a = (void*)0;
  static volatile int * volatile * const *b = a;
  int main (int argc, char* argv[])
  {
      if((void*)0 != b)   printf("error");  
  }

$: ../gcc-7.4/bin/gcc s.c
  s.c:2:45: error: Inilializer element is not constant

$: ../gcc-trunk/bin/gcc s.c

version of GCC: 
gcc version 10.0.0 20190913 (experimental) (GCC)

gcc-7 can not generate an executable file but gcc-trunk can.