[llvm-bugs] [Bug 32447] New: llvm/tools/clang/lib/Sema/SemaOverload.cpp: PVS-Studio: CWE-476 (NULL Pointer Dereference)

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Mar 28 00:46:05 PDT 2017


            Bug ID: 32447
           Summary: llvm/tools/clang/lib/Sema/SemaOverload.cpp:
                    PVS-Studio: CWE-476 (NULL Pointer Dereference)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: razmyslov at viva64.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

We have found a weakness using PVS-Studio tool. PVS-Studio is a static code
analyzer for C, C++ and C#: https://www.viva64.com/en/pvs-studio/

Analyzer warning: V595 The 'Initializer' pointer was utilized before it was
verified against nullptr. Check lines: 335, 338. semaoverload.cpp 335

StandardConversionSequence::getNarrowingKind(....) const {
  const Expr *Initializer = IgnoreNarrowingConversion(Converted);

  if (Initializer->isValueDependent()) // <=
    return NK_Dependent_Narrowing;

  if (Initializer &&                   // <=
      Initializer->isIntegerConstantExpr(IntConstantValue, Ctx)){

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