[LLVMbugs] [Bug 2518] New: scan-build treats -[NSAutoreleasePool drain] as -[ NSAutoreleasePool release]

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Jul 3 21:42:23 PDT 2008


           Summary: scan-build treats -[NSAutoreleasePool drain] as -
                    [NSAutoreleasePool release]
           Product: clang
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: rix.rob at gmail.com
                CC: llvmbugs at cs.uiuc.edu

This was found with the common idiom of having an autorelease pool around a

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

while(…) {
  …do some stuff…
  [pool drain];

[pool release];

In this example, scan-build will report Use-After-Release bugs on [pool drain]
(for the second pass through the loop) and on [pool release] (after a single
pass through the loop).

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