Merge remote-tracking branch 'origin/issue527'

* origin/issue527:
  docs: update Changelog; closes #527.
  issue #527: catch new-style module tracebacks like vanilla.

ansible_mitogen/runner.py

@@ -42,6 +42,7 @@ import shlex
 import shutil
 import sys
 import tempfile
+import traceback
 import types
 
 import mitogen.core
@@ -871,6 +872,11 @@ class NewStyleRunner(ScriptRunner):
             except SystemExit:
                 exc = sys.exc_info()[1]
                 rc = exc.args[0]
+            except Exception:
+                # This writes to stderr by default.
+                traceback.print_exc()
+                rc = 1
+
         finally:
             self.atexit_wrapper.run_callbacks()
 

docs/changelog.rst

@@ -266,6 +266,11 @@ Fixes
 * `#499 <https://github.com/dw/mitogen/issues/499>`_: the ``allow_same_user``
   Ansible configuration setting is respected.
 
+* `#527 <https://github.com/dw/mitogen/issues/527>`_: crashes in modules are
+  trapped and reported in a manner that matches Ansible. In particular, a
+  module crash no longer leads to an exception that may crash the corresponding
+  action plug-in.
+
 * `dc1d4251 <https://github.com/dw/mitogen/commit/dc1d4251>`_: the
   ``synchronize`` module could fail with the Docker transport due to a missing
   attribute.

tests/ansible/integration/runner/all.yml

@@ -1,5 +1,6 @@
 - include: atexit.yml
 - include: builtin_command_module.yml
+- include: crashy_new_style_module.yml
 - include: custom_bash_hashbang_argument.yml
 - include: custom_bash_old_style_module.yml
 - include: custom_bash_want_json_module.yml

tests/ansible/integration/runner/crashy_new_style_module.yml

@@ -0,0 +1,18 @@
+# issue #527: catch exceptions from crashy modules.
+
+- name: integration/runner/crashy_new_style_module.yml
+  hosts: test-targets
+  tasks:
+    - custom_python_run_script:
+        script: kaboom
+      register: out
+      ignore_errors: true
+
+    - assert:
+        that:
+        - not out.changed
+        - out.rc == 1
+        - out.msg == "MODULE FAILURE"
+        - out.module_stdout == ""
+        - "'Traceback (most recent call last)' in out.module_stderr"
+        - "\"NameError: name 'kaboom' is not defined\" in out.module_stderr"