tests: activate faulthandler if available

dev_requirements.txt

@@ -5,6 +5,7 @@ mock==2.0.0
 pytz==2018.5
 cffi==1.11.2  # Random pin to try and fix pyparser==2.18 not having effect
 pycparser==2.18  # Last version supporting 2.6.
+faulthandler==3.1; python_version < '3.3'  # used by testlib
 pytest-catchlog==1.2.2
 pytest==3.1.2
 PyYAML==3.11; python_version < '2.7'

tests/testlib.py

@@ -14,6 +14,11 @@ import mitogen.core
 import mitogen.master
 import mitogen.utils
 
+try:
+    import faulthandler
+except ImportError:
+    pass
+
 try:
     import urlparse
 except ImportError:
@@ -32,6 +37,9 @@ sys.path.append(DATA_DIR)
 if mitogen.is_master:
     mitogen.utils.log_to_file()
 
+if faulthandler is not None:
+    faulthandler.enable()
+
 
 def data_path(suffix):
     path = os.path.join(DATA_DIR, suffix)