vim-patch:7.4.2356 (#6880)

Problem:    Reading past end of line when using previous substitute pattern.
            (Dominique Pelle)
Solution:   Don't set "pat" only set "searchstr".

ea683da58c

src/nvim/testdir/Makefile

@@ -58,6 +58,7 @@ NEW_TESTS ?= \
 	    test_nested_function.res \
 	    test_normal.res \
 	    test_quickfix.res \
+	    test_search.res \
 	    test_signs.res \
 	    test_smartindent.res \
 	    test_stat.res \

src/nvim/testdir/test_search.vim

@@ -0,0 +1,12 @@
+" Test for the search command
+
+func Test_use_sub_pat()
+  split
+  let @/ = ''
+  func X()
+    s/^/a/
+    /
+  endfunc
+  call X()
+  bwipe!
+endfunc