[cfe-dev] fatal error while reparsing translation unit: file '/some/path/to/header' has been modified since the precompiled header '/tmp/preamble-8ae0ef.pch' was built

[Dan Schmidt]

ping

Has anyone else seen similar errors? Is this a bug in libclang?

On Tue Jun 17 2014 at 10:48:04 AM, Manuel Klimek <klimek at google.com> wrote:

> +argyrios
>
> On Mon, Jun 16, 2014 at 2:07 PM, Dan Schmidt <dcschmid at gmail.com> wrote:
>
>> Hello clang devs,
>>
>> I use YouCompleteMe as a semantic completion engine for vim, which in
>> turn uses libclang to provide completions. By default, YCM uses the 3.4
>> version of libclang, and all works well. However, I recently updated it to
>> use the head version and now I'm seeing errors like that listed in the
>> subject. I've been able to create a minimal reproduction - see the attached
>> files.
>>
>> To execute run commands similar to the following:
>>
>>    - tar xvf clang_parse.tar.gz
>>    - cd clang_parse
>>    - mkdir obj
>>    - cd obj
>>    - cmake -D CMAKE_BUILD_TYPE=Release -G "Unix Makefiles" -D
>>    PATH_TO_LLVM_ROOT=<path to llvm head install dir - should have include and
>>    lib under here> ../src/
>>    - make
>>    - ./parse_tu
>>
>> The basic test case is this:
>>
>>    - Write the small cpp and h files to disk.
>>    - Parse the translation unit - observe that the syntax error is
>>    reported
>>    - Immediately reparse the TU.
>>    - Update the header in memory and reparse - observe that the syntax
>>    error is gone.
>>    - Save the header to disk and reparse. Observe the "file
>>    '/tmp/header_file.h' has been modified since the precompiled header
>>    '/some/path/preamble-eb3c0c.pch' was built" error.
>>
>> Am I using these methods incorrectly, or is there a bug in clang? If I'm
>> using them incorrectly, what is the correct way to reparse a translation
>> unit that has changed?
>>
>> Thanks,
>> Dan
>>
>>
>>
>> _______________________________________________
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>> cfe-dev at cs.uiuc.edu
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>>
>>
>
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