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New FAQ entry; segfaults on some linux distros

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Strahinja Val Markovic 2013-02-17 19:07:50 -08:00
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README.md
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@ -802,6 +802,25 @@ to use. You may need to set these flags to something else, but you need to make
sure you use the same version of Python that your Vim binary is built against,
which is highly likely to be the system's default Python.
### I get `Vim: Caught deadly signal SEGV` on Vim startup
This can happen on some Linux distros. If you encounter this situation, run Vim
under `gdb`. You'll probably see something like this in the output when Vim
crashes:
```
undefined symbol: clang_CompileCommands_dispose
```
This means that Vim is trying to load a `libclang.so` that is too old. You need
at least a 3.2 libclang. Some distros ship with a system `libclang.so` that
identifies itself as 3.2 but is not; it was cut from the upstream sources before
the official 3.2 release and some API changes (like the addition of the
CompileCommands API) were added after their cut.
So just go through the installation guide and make sure you are using a correct
`libclang.so`. I recommend downloading prebuilt binaries from llvm.org.
### Why isn't YCM just written in plain VimScript, FFS?
Because of the identifier completion engine and subsequence-based filtering.