vim-patch:7.4.1394

Problem:    Can't sort inside a sort function.
Solution:   Use a struct to store the sort parameters. (Jacob Niehus)

0b962473dd

test/functional/legacy/function_sort_spec.lua

@@ -2,6 +2,7 @@ local helpers = require('test.functional.helpers')
 local clear = helpers.clear
 local eq = helpers.eq
 local eval = helpers.eval
+local execute = helpers.execute
 
 describe('sort', function()
   before_each(clear)
@@ -26,4 +27,16 @@ describe('sort', function()
   it('numbers compared as float', function()
     eq({0.28, 3, 13.5}, eval("sort([13.5, 0.28, 3], 'f')"))
   end)
+
+  it('ability to call sort() from a compare function', function()
+    execute('func Compare1(a, b) abort')
+    execute([[call sort(range(3), 'Compare2')]])
+    execute('return a:a ># a:b')
+    execute('endfunc')
+
+    execute('func Compare2(a, b) abort')
+    execute('return a:a <# a:b')
+    execute('endfunc')
+    eq({1, 3, 5}, eval("sort([3, 1, 5], 'Compare1')"))
+  end)
 end)