:YcmDiags does not work.

[Mizuchi]

I have such code in /tmp/a.cpp::

#include<iostream>
int main() {
    std::cout << "hello, world" << std::endl;
}

When I perform :YcmDiags I got this:

Forcing compilation, this will block Vim until done.
Unable to retrieve diagnostics, see output of `:mes` for details.
No warnings or errors detected

And :mes did not contain more information. Here is debug info:

Printing YouCompleteMe debug information...
-- Flags for /usr/share/vim/vimfiles/doc/youcompleteme.txt loaded from /home/ytj/.vim/.ycm_extr
a_conf.py:
-- ['-Wall', '-Wextra', '-Werror', '-Wc++98-compat', '-Wno-long-long', '-Wno-variadic-macros',
'-fexceptions', '-DNDEBUG', '-DUSE_CLANG_COMPLETER', '-std=c++11', '-x', 'c++', '-I', '/home/yt
j/.vim/.', '-I', '/usr/share/vim/vimfiles/autoload/../python/clang_includes']
-- Has Clang support compiled in: True
-- clang version 3.2 (tags/RELEASE_32/final)

Here is my .vimrc (I removed all other plugins):

source /usr/share/vim/vim73/gvimrc_example.vim
let g:ycm_global_ycm_extra_conf = "/home/ytj/.vim/.ycm_extra_conf.py"

BTW, my vim's version is 7.3.798, python 2.7.3 with archlinux. It seems that completion engine works fine. This issue makes syntastic does not work as well.

[Valloric]

What did :mes contain (if anything)? Could you paste the output here?

Are you able to get semantic completions for C++ in this file? You should get a list of member of the std namespace upon typing std:: in that file.

[Mizuchi]

This is what I got from :mes :

Messages maintainer: Bram Moolenaar <[email protected]>
"a.cpp" 4L, 80C
Forcing compilation, this will block Vim until done.
Unable to retrieve diagnostics, see output of `:mes` for details.
No warnings or errors detected

Yes, I could get semantic completions. I got a list of member when I type std::. Only :YcmDiags does not work.

OK, maybe I did not say very clear. Let me give a more specific description.

What steps will reproduce the problem?

1. create /tmp/a.cpp described above
2. $ vim /tmp/a.cpp
3. run :YcmDiags

What is the expected output?
This is a legal c++ source code. I think it should report something like "No Errors".

What do you see instead?

Forcing compilation, this will block Vim until done.
Unable to retrieve diagnostics, see output of `:mes` for details.
No warnings or errors detected

[Valloric]

Interesting... I can reproduce this. If I change the contents of the file to the following, then it works (notice the extra newline between the function and the include):

#include<iostream>

int main() {
    std::cout << "hello, world" << std::endl;
}

So this seems like it might be a clang bug or something? It's not a YCM bug, that's for sure (thus closing).

Anyway, just add that extra newline.