After r303589, Assertion failed: (0 <= N && N < static_cast<int>(m_byteToColumn.size())), function byteToContainingColumn, file tools/clang/lib/Frontend/TextDiagnostic.cpp, line 281. #33249
Description
| Bugzilla Link | 33902 |
| Resolution | FIXED |
| Resolved on | Aug 28, 2017 09:02 |
| Version | trunk |
| OS | All |
| Blocks | #33196 |
| CC | @emaste,@zmodem,@zygoloid,@sesse |
Extended Description
I recently imported llvm/clang trunk r308421 into FreeBSD 12-CURRENT, and afterwards, I got a report [1] that building the graphics/libchamplain port lead to an assertion failure:
Assertion failed: (0 <= N && N < static_cast(m_byteToColumn.size())), function byteToContainingColumn, file /poudriere/jails/head-amd64/usr/src/contrib/llvm/tools/clang/lib/Frontend/TextDiagnostic.cpp, line 281.
Bisection shows this assertion failure has been introduced by r303589. Minimized test case:
#define a(b) #b
#define c(d) _Pragma(a(d))
#define e(f) c(GCC warning #f)
e() e()
Output of clang r303588:
testcase.c:4:1: warning: [-W#pragma-messages]
e() e()
^
testcase.c:3:14: note: expanded from macro 'e'
#define e(f) c(GCC warning #f)
^
testcase.c:2:14: note: expanded from macro 'c'
#define c(d) _Pragma(a(d))
^
<scratch space>:4:6: note: expanded from here
GCC warning ""
^
testcase.c:4:5: warning: [-W#pragma-messages]
e() e()
^
testcase.c:3:14: note: expanded from macro 'e'
#define e(f) c(GCC warning #f)
^
testcase.c:2:14: note: expanded from macro 'c'
#define c(d) _Pragma(a(d))
^
<scratch space>:5:6: note: expanded from here
GCC warning ""
^
2 warnings generated.
Output of clang r303589:
testcase.c:4:1: warning: [-W#pragma-messages]
e() e()
^
testcase.c:3:14: note: expanded from macro 'e'
#define e(f) c(GCC warning #f)
^
testcase.c:2:14: note: expanded from macro 'c'
#define c(d) _Pragma(a(d))
^
<scratch space>:4:6: note: expanded from here
GCC warning ""
^
testcase.c:4:5: warning: [-W#pragma-messages]
e() e()
^
testcase.c:3:14: note: expanded from macro 'e'
#define e(f) c(GCC warning #f)
^
testcase.c:2:14: note: expanded from macro 'c'
#define c(d) _Pragma(a(d))
^
<scratch space>:5:6: note: expanded from here
Assertion failed: (0 <= N && N < static_cast<int>(m_byteToColumn.size())), function byteToContainingColumn, file /home/dim/src/llvm-trunk/tools/clang/lib/Frontend/TextDiagnostic.cpp, line 281.