PreprocessingRecord assertion failure, line 257

[llvmbot]

Bugzilla Link	14017
Version	trunk
OS	Windows NT
Attachments	The source that triggers the error
Reporter	LLVM Bugzilla Contributor

Extended Description

Clang fails with a correct source file:

E:\llvm\llvm\bin\Debug>c-index-test -test-load-source all fail.c
Assertion failed: (PreprocessedEntities.empty() || !SourceMgr.isBeforeInTranslat
ionUnit(BeginLoc, PreprocessedEntities.back()->getSourceRange().getBegin())) &&
"a macro directive was encountered out-of-order", file .\PreprocessingRecord.cpp
, line 257
libclang: crash detected during parsing: {
'source_filename' : '(null)'
'command_line_args' : ['fail.c'],
'unsaved_files' : [],
'options' : 1,
}
Unable to load translation unit!

[llvmbot]

Another code example:
/*
This code produces an assert in both LLVM 3.1 and 3.2:
"Assertion failed: (PreprocessedEntities.empty() || !SourceMgr.isBeforeInTranslat
ionUnit(BeginLoc, PreprocessedEntities.back()->getSourceRange().getBegin())) &&
"a macro directive was encountered out-of-order", file ..........\src\tools
clang\lib\Lex\PreprocessingRecord.cpp, line 256"

when running a Debug version, in Release it works OK

Only tested on Windows 7,
project generated with "cmake -G "Visual Studio 9 2008" ..\src"

Command line:
..\llvm3.2\build\bin\Debug\c-index-test.exe -test-load-source all pp.c
*/

#define VAL 1166
#define SIM_OP variable
#define NO_GOOD(Bit, Reg) Reg = Bit
#define GOOD(Reg, Bit) Reg = Bit

extern int variable;

void f(void)
{
NO_GOOD(VAL,SIM_OP); // <-- This line produces the assert
GOOD(SIM_OP,VAL); // <-- This line goes OK
}

[cor3ntin]

Unable to reproduce on clang 17