#include <cstdio>

class foo {
 public:
  foo() : id(0) {}
  ~foo() {}

  void operator delete(void *p) {
    foo *obj = static_cast<foo *>(p);
    if (obj->id != 0) {  // <<<<<<<<<<< MSAN complains here
      fprintf(stderr, "Error: id isn't 0");
    }
    ::operator delete(p);
  }

  const int id;
};

int main() {
  foo *fooA = new foo();
  delete fooA;
  return 0;
}

==43601==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x48b985 in foo::operator delete(void*) /usr/local/google/home/mascasa/code/test/minimal.cc:10:9
    #1 0x48b3e0 in main /usr/local/google/home/mascasa/code/test/minimal.cc:21:3
    #2 0x7f27a478df44 in __libc_start_main /build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:287
    #3 0x41a81e in _start (/usr/local/google/home/mascasa/code/test/minimal.out+0x41a81e)

  Memory was marked as uninitialized
    #0 0x44274f in __sanitizer_dtor_callback /usr/local/google/home/mascasa/code/llvm/llvm-project/compiler-rt/lib/msan/msan_interceptors.cc:886:3
    #1 0x48b6c3 in foo::~foo() /usr/local/google/home/mascasa/code/test/minimal.cc:6:11
    #2 0x48b3bb in main /usr/local/google/home/mascasa/code/test/minimal.cc:21:3
    #3 0x7f27a478df44 in __libc_start_main /build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:287

SUMMARY: MemorySanitizer: use-of-uninitialized-value /usr/local/google/home/mascasa/code/test/minimal.cc:10:9 in foo::operator delete(void*)