[LLVMbugs] [Bug 20022] New: warn on mismatched pragma diagnostic push/pop

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20022

            Bug ID: 20022
           Summary: warn on mismatched pragma diagnostic push/pop
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

We do warn on pop without push, but we don't warn on push with no pop. We
should do that. Testcase:

  #pragma GCC diagnostic push
  #pragma GCC diagnostic ignored "-Woverloaded-virtual"

GCC doesn't warn on anything I tried, not even popping an empty stack.

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