Make libstdc++ tests FAIL on Python errors

* testsuite/lib/gdb-test.exp (gdb-test): Fail if Python error occurs.

From-SVN: r240237

libstdc++-v3/ChangeLog

@@ -1,5 +1,7 @@
 2016-09-19  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/lib/gdb-test.exp (gdb-test): Fail if Python error occurs.
+
 	* python/libstdcxx/v6/printers.py (SingleObjContainerPrinter): Allow
 	display_hint to be set by subclasses.
 	(StdVariantPrinter): Use array for display_hint. Adjust output to be

libstdc++-v3/testsuite/lib/gdb-test.exp

@@ -210,6 +210,12 @@ proc gdb-test { marker {selector {}} {load_xmethods 0} } {
 	    return
 	}
 
+	-re {Error while executing Python code.[\n\r]} {
+	    fail "$testname"
+	    remote_close target
+	    return
+	}
+
 	-re {^[^$][^\n\r]*[\n\r]+} {
 	    send_log "skipping: $expect_out(buffer)"
 	    exp_continue