- fix issue181: --pdb now also works on collect errors. This was

implemented by a slight internal refactoring and the introduction
  of a new hook ``pytest_exception_interact`` hook.

- fix issue341: introduce new experimental hook for IDEs/terminals to
  intercept debugging: ``pytest_exception_interact(node, call, report)``.

_pytest/core.py

@@ -298,7 +298,8 @@ class PluginManager(object):
             showlocals=getattr(option, 'showlocals', False),
             style=style,
         )
-        res = self.hook.pytest_internalerror(excrepr=excrepr)
+        res = self.hook.pytest_internalerror(excrepr=excrepr,
+                                             excinfo=excinfo)
         if not py.builtin.any(res):
             for line in str(excrepr).split("\n"):
                 sys.stderr.write("INTERNALERROR> %s\n" %line)