patch 8.0.0305: invalid memory access when option has duplicate flag commit https://github.com/vim/vim/commit/aaaf57d8a936efe420190c077e4a74041cc6c72e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 5 14:13:20 2017 +0100 patch 8.0.0305: invalid memory access when option has duplicate flag Problem: Invalid memory access when option has duplicate flag. Solution: Correct pointer computation. (Dominique Pelle, closes https://github.com/vim/vim/issues/1442)

--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -13,6 +13,12 @@ function! Test_whichwrap()
   set whichwrap+=h,l
   call assert_equal('b,s,h,l', &whichwrap)
 
+  set whichwrap=h,h
+  call assert_equal('h', &whichwrap)
+
+  set whichwrap=h,h,h
+  call assert_equal('h', &whichwrap)
+
   set whichwrap&
 endfunction