diff --git a/client/mysql.cc b/client/mysql.cc
index 715d74f18b2..60f724863ff 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -2671,7 +2671,7 @@ You can turn off this feature to get a quicker startup with -A\n\n");
         mysql_free_result(fields);
         break;
       }
-      field_names[i][num_fields*2]= '\0';
+      field_names[i][num_fields*2]= NULL;
       j=0;
       while ((sql_field=mysql_fetch_field(fields)))
       {
diff --git a/client/mysqlcheck.c b/client/mysqlcheck.c
index 7822460e341..c7372a39299 100644
--- a/client/mysqlcheck.c
+++ b/client/mysqlcheck.c
@@ -440,6 +440,7 @@ static int process_all_databases()
     if (process_one_db(row[0]))
       result = 1;
   }
+  mysql_free_result(tableres);
   return result;
 }
 /* process_all_databases */
@@ -910,10 +911,10 @@ static int dbConnect(char *host, char *user, char *passwd)
                                        opt_ssl_mode == SSL_MODE_REQUIRED)))
   {
     DBerror(&mysql_connection, "when trying to connect");
-    return 1;
+    DBUG_RETURN(1);
   }
   mysql_connection.reconnect= 1;
-  return 0;
+  DBUG_RETURN(0);
 } /* dbConnect */
 
 
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index 99d3203fb51..8086c641d11 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -100,6 +100,8 @@ use mtr_results;
 use IO::Socket::INET;
 use IO::Select;
 
+push @INC, ".";
+
 require "lib/mtr_process.pl";
 require "lib/mtr_io.pl";
 require "lib/mtr_gcov.pl";
diff --git a/sql/gen_lex_hash.cc b/sql/gen_lex_hash.cc
index fc6d0938d13..569a2a1a4d0 100644
--- a/sql/gen_lex_hash.cc
+++ b/sql/gen_lex_hash.cc
@@ -311,6 +311,7 @@ void print_find_structs()
   set_links(root_by_len,max_len);
   print_hash_map("sql_functions_map");
 
+  free(hash_map);
   hash_map= 0;
   size_hash_map= 0;
 
@@ -319,6 +320,10 @@ void print_find_structs()
   add_structs_to_map(root_by_len2,max_len2);
   set_links(root_by_len2,max_len2);
   print_hash_map("symbols_map");
+
+  free(hash_map);
+  hash_map= 0;
+  size_hash_map= 0;
 }