[llvm-bugs] [Bug 24564] New: Clang failed to discard const quilifier

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https://llvm.org/bugs/show_bug.cgi?id=24564

            Bug ID: 24564
           Summary: Clang failed to discard const quilifier
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: rajendra.sy at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Sample 'c' code:

#include <stdio.h>
int main()
{
  const int k = 5;
  int *kptr = &k;
  *kptr = 7;
  printf("%d\n", k);
  return 0;
}
The output of program is '5' not '7'.

The clang shows a warning
test.c:6:9: warning: initializing 'int *' with an expression of type 'const int
*' discards qualifiers
      [-Wincompatible-pointer-types-discards-qualifiers]
        int *kptr = &k;

As per the warning clang has to ignore the 'const' qualifier & update the value
to 7. But it does not update it.

I tried this with latest GCC it does throw a similar warning & update the value
to 7.

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