commit 18a2b87ca27c378a555b20f14a284d2ce3511427
author Bram Moolenaar <Bram@vim.org> Thu Mar 19 13:08:45 2020 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Mar 19 13:08:45 2020 +0100
tree 8edab39837a409af9a30ea1082aa281a4d0eb217
parent a3a9c8ef697bbf6f640cde99710b6f534f29f77d

patch 8.2.0404: writefile() error does not give a hint

Problem:    Writefile() error does not give a hint.
Solution:   Add remark about first argument.

src/testdir/test_writefile.vim

diff --git a/src/testdir/test_writefile.vim b/src/testdir/test_writefile.vim
index 5449071..497fa0b 100644
--- a/src/testdir/test_writefile.vim
+++ b/src/testdir/test_writefile.vim
@@ -16,6 +16,8 @@
   call assert_equal("morning", l[3])
   call assert_equal("vimmers", l[4])
   call delete(f)
+
+  call assert_fails('call writefile("text", "Xfile")', 'E475: Invalid argument: writefile() first argument must be a List or a Blob')
 endfunc
 
 func Test_writefile_ignore_regexp_error()