[LLVMbugs] [Bug 18991] New: Add warning for implicit nil initialization of strong object pointers in ARC

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18991

            Bug ID: 18991
           Summary: Add warning for implicit nil initialization of strong
                    object pointers in ARC
           Product: clang
           Version: 3.4
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: mshields at mac.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

I ran into what I thought was a bug in the static analyzer
<http://llvm.org/bugs/show_bug.cgi?id=18981> but was pointed out to me that
this isn't a bug since ARC initialized all strong references to nil. In this
instance it masked a bug in our code where an object wasn't initialized as we
thought. A warning in clang for this sort of situation would be appreciated.
Depending on what we were doing, this could have caused a crash (like adding to
an NSArray), but as it was it simply caused the feature to silently fail.

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