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-rw-r--r--test/functional/options/tabstop_spec.lua23
1 files changed, 23 insertions, 0 deletions
diff --git a/test/functional/options/tabstop_spec.lua b/test/functional/options/tabstop_spec.lua
new file mode 100644
index 0000000000..dc3ba38438
--- /dev/null
+++ b/test/functional/options/tabstop_spec.lua
@@ -0,0 +1,23 @@
+local helpers = require('test.functional.helpers')(after_each)
+
+local clear = helpers.clear
+local feed = helpers.feed
+local eq = helpers.eq
+local eval = helpers.eval
+
+describe("'tabstop' option", function()
+ before_each(function()
+ clear()
+ end)
+
+ -- NOTE: Setting 'tabstop' to a big number reproduces crash #2838.
+ -- Disallowing big 'tabstop' would not fix #2838, only hide it.
+ it("tabstop=<big-number> does not crash #2838", function()
+ -- Insert a <Tab> character for 'tabstop' to work with.
+ feed('i<Tab><Esc>')
+ -- Set 'tabstop' to a very high value.
+ -- Use feed(), not command(), to provoke crash.
+ feed(':set tabstop=3000000000<CR>')
+ eq(2, eval("1+1")) -- Still alive?
+ end)
+end)