[LLVMbugs] [Bug 21960] New: [fuzz] Assertion `(BacktrackPositions.empty() || BacktrackPositions.back() < i) && "The backtrack pos points inside the annotated tokens!"' failed.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21960

            Bug ID: 21960
           Summary: [fuzz] Assertion `(BacktrackPositions.empty() ||
                    BacktrackPositions.back() < i) && "The backtrack pos
                    points inside the annotated tokens!"' failed.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: sami.liedes at iki.fi
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Fuzzing discovered that the test case below, when given as input to

  clang -fno-crash-diagnostics -std=c++11 -xc++ -c -emit-llvm

causes this assertion failure:

clang-3.6: tools/clang/lib/Lex/PPCaching.cpp:109: void
clang::Preprocessor::AnnotatePreviousCachedTokens(const clang::Token&):
Assertion `(BacktrackPositions.empty() || BacktrackPositions.back() < i) &&
"The backtrack pos points inside the annotated tokens!"' failed.

Test case:

--------------------------------------------------
struct S {}
template<T> struct K : S
K<>
--------------------------------------------------

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20141218/d06a493b/attachment.html>