BUG#10267 mysqltest, wrong number of loops when a script is sourced within a loop

client/mysqltest.c:
  Don't open a sourced file more than once as it will already have been read into the q_lines cache
mysql-test/r/mysqltest.result:
  Added tests for source command inside of while loop
mysql-test/t/mysqltest.test:
  Added tests for source command inside of while loop

client/mysqltest.c

@@ -962,7 +962,13 @@ int do_source(struct st_query* q)
     *p++= 0;
     check_eol_junk(p);
   }
+  /* If this file has already been sourced, dont source it again.
+     It's already available in the q_lines cache */
+  if (parser.current_line < (parser.read_lines - 1))
+    return 0;
   return open_file(name);
+
+
 }
 
 
@@ -2378,7 +2384,7 @@ int read_query(struct st_query** q_ptr)
     DBUG_PRINT("warning",("too long query"));
     DBUG_RETURN(1);
   }
-   DBUG_PRINT("info", ("query: %s", read_query_buf));
+  DBUG_PRINT("info", ("query: %s", read_query_buf));
   if (*p == '#')
   {
     q->type = Q_COMMENT;

mysql-test/r/mysqltest.result

@@ -224,6 +224,61 @@ mysqltest: At line 1: Missing file name in source
 mysqltest: At line 1: Could not open file ./non_existingFile
 mysqltest: In included file "./var/tmp/recursive.sql": At line 1: Source directives are nesting too deep
 mysqltest: In included file "./var/tmp/error.sql": At line 1: query 'garbage ' failed: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'garbage' at line 1
+
+2 = outer loop variable after while
+here is the sourced script
+
+2 = outer loop variable before dec
+
+1 = outer loop variable after dec
+
+1 = outer loop variable after while
+here is the sourced script
+
+1 = outer loop variable before dec
+
+0 = outer loop variable after dec
+
+2 = outer loop variable after while
+here is the sourced script
+
+2 = outer loop variable before dec
+
+1 = outer loop variable after dec
+
+1 = outer loop variable after while
+here is the sourced script
+
+1 = outer loop variable before dec
+
+0 = outer loop variable after dec
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
+
+In loop
+here is the sourced script
 mysqltest: At line 1: Missing argument to sleep
 mysqltest: At line 1: Invalid argument to sleep "abc"
 1

mysql-test/t/mysqltest.test

@@ -524,6 +524,49 @@ echo $1;
 --exec echo "source var/tmp/error.sql;" | $MYSQL_TEST 2>&1
 
 
+# Test execution of source in a while loop
+--exec echo "echo here is the sourced script;" > var/tmp/sourced.sql
+--disable_query_log
+let $outer= 2; # Number of outer loops
+while ($outer)
+{
+  eval SELECT '$outer = outer loop variable after while' AS "";
+
+  --source var/tmp/sourced.sql
+
+  eval SELECT '$outer = outer loop variable before dec' AS "";
+  dec $outer;
+  eval SELECT '$outer = outer loop variable after dec' AS "";
+}
+
+let $outer= 2; # Number of outer loops
+while ($outer)
+{
+  eval SELECT '$outer = outer loop variable after while' AS "";
+
+  echo here is the sourced script;
+
+  eval SELECT '$outer = outer loop variable before dec' AS "";
+  dec $outer;
+  eval SELECT '$outer = outer loop variable after dec' AS "";
+}
+
+
+# Test execution of source in a while loop
+--exec echo "--source var/tmp/sourced.sql" > var/tmp/sourced1.sql
+--disable_abort_on_error
+# Sourcing of a file within while loop, sourced file will
+# source other file
+let $num= 9;
+while ($num)
+{
+   SELECT 'In loop' AS "";
+   --source var/tmp/sourced1.sql
+   dec $num;
+}
+--enable_abort_on_error;
+--enable_query_log
+
 # ----------------------------------------------------------------------------
 # Test sleep command
 # ----------------------------------------------------------------------------