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[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
This commit is contained in:
Denys Petrov 2021-06-16 16:44:36 +03:00
parent a4729f7f88
commit e76c008c90
1 changed files with 36 additions and 0 deletions
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36
clang/test/Analysis/diagnostics/PR46264.cpp Normal file
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// 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