https://bugs.llvm.org/show_bug.cgi?id=42573
Bug ID: 42573
Summary: Memory leak checker doesn't report leak when
constructor dereferences the argument
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Static Analyzer
Assignee: dcough...@apple.com
Reporter: hiradi...@msn.com
CC: dcough...@apple.com, llvm-bugs@lists.llvm.org
Not sure why static analyzer doesn't report memory leak in the following case:
$ cat test.cpp
#include<memory>
#include<iostream>
struct A {
A(const std::shared_ptr<int> &s) {
std::cout << "constructor" << *s;
}
};
int main() {
auto l = std::make_shared<A>(nullptr);
int *p = new int;
int i = *p;
return i;
}
However, if we remove the dereference of `s` it works.
$ cat test-no-deref-s.cpp
#include<memory>
#include<iostream>
struct A {
A(const std::shared_ptr<int> &s) {
std::cout << "constructor"; // removed the deref of s
}
};
int main() {
auto l = std::make_shared<A>(nullptr);
int *p = new int;
int i = *p;
return i;
}
$ clang++ --analyze test-no-deref-s.cpp -std=c++14
test1.cpp:14:3: warning: Potential leak of memory pointed to by 'p'
int i = *p;
^~~~~
1 warning generated.
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