From f1551964448607f8222de2d8f0992ea43eb2fe67 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Tue, 15 Mar 2016 12:55:58 +0100
Subject: patch 7.4.1565 Problem:    Crash when assert_equal() runs into a NULL
 string. Solution:   Check for NULL. (Dominique) Add a test.

---
 src/testdir/test_assert.vim | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/testdir')

diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 6d2f80094a..df2636d7bc 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -48,6 +48,21 @@ func Test_wrong_error_type()
   call assert_equal(type([]), type(verrors))
 endfunc
 
+func Test_compare_fail()
+  let s:v = {}          
+  let s:x = {"a": s:v} 
+  let s:v["b"] = s:x   
+  let s:w = {"c": s:x, "d": ''}
+  try
+    call assert_equal(s:w, '')
+  catch
+    call assert_exception('E724:')
+    call assert_true(v:errors[0] =~ "Expected NULL but got ''")
+    call remove(v:errors, 0)
+  endtry
+endfunc
+
+
 func Test_user_is_happy()
   smile
   sleep 300m
-- 
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