[analyzer] Added a test case for PR46264

Summary: It's not able to reproduce the issue (https://bugs.llvm.org/show_bug.cgi?id=46264) for the latest sources. Add a reported test case to try to catch the problem if occur es.

Differential Revision: https://reviews.llvm.org/D104381

Prevent: https://bugs.llvm.org/show_bug.cgi?id=46264

clang/test/Analysis/diagnostics/PR46264.cpp

@@ -0,0 +1,36 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -verify %s
+
+// PR46264
+// This case shall not crash with an assertion failure about void* dereferening.
+// The crash has been last seen on commit
+// `3ed8ebc2f6b8172bed48cc5986d3b7af4cfca1bc` from 24.05.2020.
+namespace ns1 {
+namespace a {
+class b {
+public:
+  typedef int b::*c;
+  operator c() { return d ? &b::d : 0; }
+  // expected-note@-1{{'?' condition is true}}
+  // expected-note@-2{{Assuming field 'd' is not equal to 0}}
+  // expected-note@-3{{Returning value, which participates in a condition later}}
+  int d;
+};
+} // namespace a
+using a::b;
+class e {
+  void f();
+  void g();
+  b h;
+};
+void e::f() {
+  e *i;
+  // expected-note@-1{{'i' declared without an initial value}}
+  if (h)
+    // expected-note@-1{{Taking true branch}}
+    // expected-note@-2{{'b::operator int ns1::a::b::*'}}
+    // expected-note@-3{{Returning from 'b::operator int ns1::a::b::*'}}
+    i->g();
+  // expected-note@-1{{Called C++ object pointer is uninitialized}}
+  // expected-warning@-2{{Called C++ object pointer is uninitialized}}
+}
+} // namespace ns1