diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index 30eab135b24..3c02f8803af 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -1528,8 +1528,8 @@ sub mysql_fix_arguments () {
   mtr_init_args(\$args);
   mtr_add_arg($args, "--defaults-file=%s", $path_config_file);
 
-  mtr_add_arg($args, "--basedir=", $basedir);
-  mtr_add_arg($args, "--bindir=", $path_client_bindir);
+  mtr_add_arg($args, "--basedir=%s", $basedir);
+  mtr_add_arg($args, "--bindir=%s", $path_client_bindir);
   mtr_add_arg($args, "--verbose");
   return mtr_args2str($exe, @$args);
 }
diff --git a/mysql-test/r/xml.result b/mysql-test/r/xml.result
index 41c0d6bee21..404b0dc3789 100644
--- a/mysql-test/r/xml.result
+++ b/mysql-test/r/xml.result
@@ -1053,4 +1053,15 @@ ExtractValue('<xml  xxx  "yyy">CharData</xml>', '/xml')
 NULL
 Warnings:
 Warning	1525	Incorrect XML value: 'parse error at line 1 pos 17: STRING unexpected ('>' wanted)'
+set @x=10;
+select extractvalue('<a></a>','$@x/a');
+ERROR HY000: XPATH syntax error: '/a'
+select extractvalue('<a></a>','round(123.4)/a');
+ERROR HY000: XPATH syntax error: '/a'
+select extractvalue('<a></a>','1/a');
+ERROR HY000: XPATH syntax error: '/a'
+select extractvalue('<a></a>','"b"/a');
+ERROR HY000: XPATH syntax error: '/a'
+select extractvalue('<a></a>','(1)/a');
+ERROR HY000: XPATH syntax error: '/a'
 End of 5.1 tests
diff --git a/mysql-test/t/xml.test b/mysql-test/t/xml.test
index d840e14ba5f..74bce8dc962 100644
--- a/mysql-test/t/xml.test
+++ b/mysql-test/t/xml.test
@@ -575,5 +575,19 @@ SELECT ExtractValue(@xml, 'html/body');
 SELECT ExtractValue('<xml "xxx" "yyy">CharData</xml>', '/xml');
 SELECT ExtractValue('<xml  xxx  "yyy">CharData</xml>', '/xml');
 
+#
+# Bug#42495 updatexml: Assertion failed: xpath->context, file .\item_xmlfunc.cc, line 2507
+#
+set @x=10;
+--error ER_UNKNOWN_ERROR
+select extractvalue('<a></a>','$@x/a');
+--error ER_UNKNOWN_ERROR
+select extractvalue('<a></a>','round(123.4)/a');
+--error ER_UNKNOWN_ERROR
+select extractvalue('<a></a>','1/a');
+--error ER_UNKNOWN_ERROR
+select extractvalue('<a></a>','"b"/a');
+--error ER_UNKNOWN_ERROR
+select extractvalue('<a></a>','(1)/a');
 
 --echo End of 5.1 tests
diff --git a/sql-bench/bench-init.pl.sh b/sql-bench/bench-init.pl.sh
index a728086760a..588e518a648 100644
--- a/sql-bench/bench-init.pl.sh
+++ b/sql-bench/bench-init.pl.sh
@@ -47,7 +47,7 @@ $opt_machine=""; $opt_suffix="";
 $opt_create_options=undef;
 $opt_optimization="None";
 $opt_hw="";
-$opt_threads=5;
+$opt_threads=-1;
 
 if (!defined($opt_time_limit))
 {
@@ -68,6 +68,11 @@ $limits=merge_limits($server,$opt_cmp);
 $date=date();
 @estimated=(0.0,0.0,0.0);		# For estimated time support
 
+if ($opt_threads != -1)
+{
+    print "WARNING: Option --threads is deprecated and has no effect\n"
+}
+
 if ($opt_hires)
 {
   eval "use Time::HiRes;";
@@ -560,8 +565,8 @@ All benchmarks takes the following options:
   Inform test suite that we are generate random inital values for sequence of
   test executions. It should be used for imitation of real conditions.
 
---threads=# (Default 5)
-  Number of threads for multi-user benchmarks.
+--threads=#  **DEPRECATED**
+  This option has no effect, and will be removed in a future version.
 
 --tcpip
   Inform test suite that we are using TCP/IP to connect to the server. In
diff --git a/sql/item_xmlfunc.cc b/sql/item_xmlfunc.cc
index 68d85418324..5601a2b18c6 100644
--- a/sql/item_xmlfunc.cc
+++ b/sql/item_xmlfunc.cc
@@ -1969,6 +1969,13 @@ my_xpath_parse_FilterExpr_opt_slashes_RelativeLocationPath(MY_XPATH *xpath)
   if (!my_xpath_parse_term(xpath, MY_XPATH_LEX_SLASH))
     return 1;
 
+  if (xpath->item->type() != Item::XPATH_NODESET)
+  {
+    xpath->lasttok= xpath->prevtok;
+    xpath->error= 1;
+    return 0;
+  }
+
   my_xpath_parse_term(xpath, MY_XPATH_LEX_SLASH);
   return my_xpath_parse_RelativeLocationPath(xpath);
 }
@@ -1976,7 +1983,6 @@ static int my_xpath_parse_PathExpr(MY_XPATH *xpath)
 {
   return my_xpath_parse_LocationPath(xpath) || 
          my_xpath_parse_FilterExpr_opt_slashes_RelativeLocationPath(xpath);
-         
 }