[llvm-bugs] [Bug 39822] New: [Coverage] clang crashes with 'Assertion SpellingRegion(SM, StartLoc, EndLoc).isInSourceOrder() failed.'

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Nov 28 05:08:16 PST 2018


            Bug ID: 39822
           Summary: [Coverage] clang crashes with 'Assertion
                    SpellingRegion(SM, StartLoc, EndLoc).isInSourceOrder()
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: digit at google.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Created attachment 21170
  --> https://bugs.llvm.org/attachment.cgi?id=21170&action=edit
Archive containing the crash backtrace + preprocessed source file + launcher

When enabling code coverage instrumentation, compiling a C++ source file makes
Clang crash with an assertion error message that reads as:

    clang++: .../llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp:789: void
clang::SourceLocation, llvm::coverage::Counter): Assertion `SpellingRegion(SM,
StartLoc, EndLoc).isInSourceOrder()' failed.

This was detected by a Chromium build bot trying to build a new source file
(see https://crbug.com/908937 for details).

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