[LLVMbugs] [Bug 18877] New: No -Wempty-body warning for empty body with a prefix label

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Feb 17 21:04:50 PST 2014


            Bug ID: 18877
           Summary: No -Wempty-body warning for empty body with a prefix
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chengniansun at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

For the following statement:
  if (i) a:;
Clang does not warn that the body is empty. 

$: cat s.c
void f(int i) {
  if (i) a:;
$: clang-trunk -Wempty-body -c s.c
$: gcc-trunk -Wempty-body -c s.c
s.c: In function ‘f’:
s.c:2:12: warning: suggest braces around empty body in an ‘if’ statement
   if (i) a:;
$: clang-trunk --version
clang version 3.5 (trunk 201498)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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