https://issues.dlang.org/show_bug.cgi?id=22841

          Issue ID: 22841
           Summary: importC: Error: variable 'var' is shadowing variable
                    'var'
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: ibuclaw@gdcproject.org

Shadowing in C11 is not forbidden, but can be warned about.

---
void test()
{
    int i;
    { unsigned i; }
}

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