[LLVMbugs] [Bug 14795] New: -frewrite-includes sometimes results in incorrect line numbers

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14795

             Bug #: 14795
           Summary: -frewrite-includes sometimes results in incorrect line
                    numbers
           Product: clang
           Version: 3.2
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: l.lunak at suse.cz
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Files processed with -frewrite-includes sometimes produce incorrect line
numbers when later compiled:

$ clang++ -v
clang version 3.2 
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ cat a.cpp
#if 0
#include "a.h"
#endif
foo bar;
$ clang++ a.cpp -c
a.cpp:4:1: error: unknown type name 'foo'
foo bar;
^
1 error generated.
$ clang++ -E -frewrite-includes a.cpp >a.ii
$ clang++ a.ii
In file included from a.ii:1:
a.cpp:7:1: error: unknown type name 'foo'
foo bar;
^
1 error generated.

The line number in the second error message is clearly incorrect.

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