https://llvm.org/bugs/show_bug.cgi?id=28913
Bug ID: 28913
Summary: "The backtrack pos points inside the annotated
tokens!" assert hit for wrong syntax
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: sha...@ceemple.com
CC: llvm-bugs@lists.llvm.org, yaron.ke...@gmail.com
Classification: Unclassified
Created attachment 16918
--> https://llvm.org/bugs/attachment.cgi?id=16918&action=edit
Test code
Clang trunk version, built in release with asserts enabled, hits the following
assert:
clang-4.0: ../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.
When compiling the following syntactically wrong code:
class A {};
template < int > class B : A
B < >
Note that syntax errors are emitted properly prior to crashing.
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