[clang] e76c008 - [analyzer] Added a test case for PR46264

[Denys Petrov via cfe-commits]

Author: Denys Petrov
Date: 2021-06-24T12:24:26+03:00
New Revision: e76c008c906af3dc093dd5c3ceaea577359b5432

URL: https://github.com/llvm/llvm-project/commit/e76c008c906af3dc093dd5c3ceaea577359b5432
DIFF: https://github.com/llvm/llvm-project/commit/e76c008c906af3dc093dd5c3ceaea577359b5432.diff

LOG: [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

Added: 
    clang/test/Analysis/diagnostics/PR46264.cpp

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/clang/test/Analysis/diagnostics/PR46264.cpp b/clang/test/Analysis/diagnostics/PR46264.cpp
new file mode 100644
index 0000000000000..466dada694be9
--- /dev/null
+++ b/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 at -1{{'?' condition is true}}
+  // expected-note at -2{{Assuming field 'd' is not equal to 0}}
+  // expected-note at -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 at -1{{'i' declared without an initial value}}
+  if (h)
+    // expected-note at -1{{Taking true branch}}
+    // expected-note at -2{{'b::operator int ns1::a::b::*'}}
+    // expected-note at -3{{Returning from 'b::operator int ns1::a::b::*'}}
+    i->g();
+  // expected-note at -1{{Called C++ object pointer is uninitialized}}
+  // expected-warning at -2{{Called C++ object pointer is uninitialized}}
+}
+} // namespace ns1