[llvm-bugs] [Bug 33694] New: False positive reported by static analyzer: "Potential memory leak"
llvm-bugs at lists.llvm.org
Wed Jul 5 13:27:30 PDT 2017
Bug ID: 33694
Summary: False positive reported by static analyzer:
"Potential memory leak"
OS: MacOS X
Component: Static Analyzer
Assignee: kremenek at apple.com
Reporter: jaf at meyersound.com
CC: llvm-bugs at lists.llvm.org
Created attachment 18754
Self-contained example program that reproduces the false-positive when you
compile it using scan-build
When I run the attached trivial example program through clang's scan-build
utility, I get a warning message that I believe is a false positive:
$ scan-build g++ bogus_memory_leak_warning.cpp
scan-build: Using '/Users/jaf/checker-279/bin/clang' for static analysis
bogus_memory_leak_warning.cpp:26:4: warning: Potential memory leak
1 warning generated.
scan-build: 1 bug found.
scan-build: Run 'scan-view
to examine bug reports.
AFAICT the code in the trivial example program doesn't have any actual memory
leaks, but SA thinks that it does. (If I'm wrong about that, I apologize).
Also note that if I comment out line 25 in the attached file, the
false-positive warning goes away; however I think the presence of that line
should not make any difference regarding whether the program has a memory leak
(This example application is just a minimal self-contained example, of course;
the actual codebase where I see this sort of false positive pop up is much
larger, but this example is easier to understand and debug)
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