[LLVMbugs] [Bug 22877] New: Missing destructors for default arguments created during list-initialization of array

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=22877

            Bug ID: 22877
           Summary: Missing destructors for default arguments created
                    during list-initialization of array
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zilla at kayari.org
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

From
http://stackoverflow.com/questions/28991043/why-does-clang-destroy-only-one-foo-object



extern "C" int puts(const char*);

struct foo {
  int* n;
    foo() : n(new int)  { puts("cons"); }
    ~foo()  { puts("dest"); delete n; }
    foo(foo&& f) : n(f.n) { f.n = 0; }
};

struct bar {
    bar(foo t=foo{}) { }
};

int main() {
    bar b[3]{};
}

clang++ -std=c++11 leak.cc -fsanitize=address

The program prints

cons
cons
cons
dest

=================================================================
==11813==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 8 byte(s) in 2 object(s) allocated from:
    #0 0x4eae5b in operator new(unsigned long)
/home/jwakely/src/llvm/llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:62:35
    #1 0x4ec178 in foo::foo() /tmp/leak.cc:5:15
    #2 0x4ebdfc in main /tmp/leak.cc:15:14
    #3 0x3236e21d64 in __libc_start_main (/lib64/libc.so.6+0x3236e21d64)

SUMMARY: AddressSanitizer: 8 byte(s) leaked in 2 allocation(s).


The expected output is:

cons
dest
cons
dest
cons
dest



This is with:

clang version 3.7.0 (trunk 229722) (llvm/trunk 229719)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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