[LLVMbugs] [Bug 9197] New: derived virtual destructor not called

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Feb 10 19:19:21 PST 2011


           Summary: derived virtual destructor not called
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu

This C++ test program should print "destructed!":

  extern "C" int puts(const char *);
  struct Test { ~Test() { puts("destructed!"); } };

  struct Base {
    virtual ~Base();
  Base::~Base() { }

  namespace {
    struct Deriv : public Base {
      Test t[1];

  int main(void) { 
    Base *b = new Deriv();
    delete b;

but doesn't when compiled by clang. The Base::~Base() destructor is called, but
not Deriv, which means that Test is never torn down. Either removing Deriv from
the anonymous namespace or making 't' not be an array masks the bug.

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