IZUHU IZUHU - 2 years ago 65
Ruby Question

Vim crashing when navigating through file

I'm very very new to Vim. I've been using it for 2 days now (out of the womb new), and I've been having some problems navigating a certain Ruby file of mine without it crashing.

Before I get to the error message, here are the steps I did to reproduce the problem...

  1. First I opened up the file as read-only with the

  2. If the file has no syntax coloring turn it on
    :syntax on
    . (For some reason it doesn't crash without it.)

  3. Navigate up and down the file with
    (reproduces the crash quicker when you set the cursor in a position where it would
    scatter the cursor more. For ex, the end of a line)

At first I thought something was wrong with my
file, but I was able to reproduce the same crash with the
file as well which is located in
folder. It took some more time to do it with tk.rb since the comments in the code make it harder to crash. (I recommend to try it on files with lots of lines like this).

Here's a gif of me reproducing the problem and the file I was navigating through to reproduce the crash...



I'm using Vim 7.4 and windows 10. If any more information is needed please ask in the comments. I would like to know how to resolve this. Vim looks like a really nice program. However, if its gonna break itself and my heart from navigating with
. I might have to travel back to the fork in the road, and walk down the emacs path.

Answer Source

As it was indicated on the comments, you should open a bug report if the problem is indeed in Vim.

But first you should try the following:

  1. Ensure you are using a version with the latest patches; there were some reports similar to the problem you are describing, and there are chances that it is already solved.
  2. Check if any setting/plugin is triggering the problem, beyond the :syntax. The procedure at Vim-FAQ 2.5 can be helpful. Some relevant parts follows:

2.5. I have a "xyz" (some) problem with Vim. How do I determine it is a problem with my setup or with Vim? / Have I found a bug in Vim?

First, you need to find out, whether the error is in the actual runtime files or any plugin that is distributed with Vim or whether it is a simple side effect of any configuration option from your .vimrc or .gvimrc. So first, start vim like this:

vim -u NONE -U NONE -N -i NONE

this starts Vim in nocompatible mode (-N), without reading your viminfo file (-i NONE), without reading any configuration file (-u NONE for not reading .vimrc file and -U NONE for not reading a .gvimrc file) or even plugin.

If the error does not occur when starting Vim this way, then the problem is either related to some plugin of yours or some setting in one of your local setup files. You need to find out, what triggers the error, you try starting Vim this way:

vim -u NONE -U NONE -N

If the error occurs, the problem is your .viminfo file. Simply delete the viminfo file then. If the error does not occur, try:

vim -u ~/.vimrc --noplugin -N -i NONE

This will simply use your .vimrc as configuration file, but not load any plugins. If the error occurs this time, the error is possibly caused by some configuration option inside your .vimrc file. Depending on the length of your vimrc file, it can be quite hard to trace the origin within that file.

The best way is to add :finish command in the middle of your .vimrc. Then restart again using the same command line. If the error still occurs, the bug must be caused because of a setting in the first half of your .vimrc. If it doesn't happen, the problematic setting must be in the second half of your .vimrc. So move the :finish command to the middle of that half, of which you know that triggers the error and move your way along, until you find the problematic option. If your .vimrc is 350 lines long, you need at a maximum 9 tries to find the offending line (in practise, this can often be further reduced, since often lines depend on each other).

If the problem does not occur, when only loading your .vimrc file, the error must be caused by a plugin or another runtime file (indent autoload or syntax script). Check the output of the :scriptnames command to see what files have been loaded and for each one try to disable each one by one and see which one triggers the bug. Often files that are loaded by vim, have a simple configuration variable to disable them, but you need to check inside each file separately.

  1. If the previous steps doesn't solved the problem you could try checking similar bug reports and try maybe some of the patches which still weren't merged:

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