Issue #8600: fix test_gdb failures when gdb issues some spurious warnings.
diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py
index 907d6ef..388f240 100644
--- a/Lib/test/test_gdb.py
+++ b/Lib/test/test_gdb.py
@@ -119,6 +119,11 @@
# Ignore some noise on stderr due to the pending breakpoint:
err = err.replace('Function "%s" not defined.\n' % breakpoint, '')
+ # Ignore some other noise on stderr (http://bugs.python.org/issue8600)
+ err = err.replace("warning: Unable to find libthread_db matching"
+ " inferior's thread library, thread debugging will"
+ " not be available.\n",
+ '')
# Ensure no unexpected error messages:
self.assertEquals(err, '')