commit 0d90e728fe089ff1bb34d6a17f5591a96b57f734
author Bram Moolenaar <Bram@vim.org> Tue Nov 03 18:20:19 2020 +0100
committer Bram Moolenaar <Bram@vim.org> Tue Nov 03 18:20:19 2020 +0100
tree c4e8d1b172ee4660250ab06fa1d9781553e7f1c7
parent 6fd3a4ba2320c4a95f02daef5f2ac76d3105d013

patch 8.2.1945: crash when passing NULL function to reduce()

Problem:    Crash when passing NULL function to reduce().
Solution:   Check for NULL pointer and give an error. (Dominique Pellé,
            closes #7243)

src/testdir/test_listdict.vim

diff --git a/src/testdir/test_listdict.vim b/src/testdir/test_listdict.vim
index ade37f8..6a7fc4c 100644
--- a/src/testdir/test_listdict.vim
+++ b/src/testdir/test_listdict.vim
@@ -740,6 +740,9 @@
 
   call assert_equal(42, reduce(test_null_list(), function('add'), 42))
   call assert_equal(42, reduce(test_null_blob(), function('add'), 42))
+
+  " should not crash
+  call assert_fails('echo reduce([1], test_null_function())', 'E1132:')
 endfunc
 
 " splitting a string to a List using split()