patch 7.4.1596
Problem:    Memory leak. (Coverity)
Solution:   Free the pattern.
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 0a9895a..c03c240 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -3404,6 +3404,7 @@
 	    vim_free(cmd);
 	}
 #endif
+	vim_free(pat);
     }
 
 theend: