fix issue #1073 -- shortcut plugin hook lookup if the attrname is not

prefixed with pytest_.

_pytest/config.py

@@ -174,6 +174,12 @@ class PytestPluginManager(PluginManager):
         if exclude_pytest_names(name):
             return None
 
+        # pytest hooks are always prefixed with pytest_
+        # so we avoid accessing possibly non-readable attributes
+        # (see issue #1073)
+        if not name.startswith("pytest_"):
+            return
+
         method = getattr(plugin, name)
         opts = super(PytestPluginManager, self).parse_hookimpl_opts(plugin, name)
         if opts is not None:

testing/test_conftest.py

@@ -388,3 +388,19 @@ def test_search_conftest_up_to_inifile(testdir, confcutdir, passed, error):
     if error:
         match += '*%d error*' % error
     result.stdout.fnmatch_lines(match)
+
+
+def test_issue1073_conftest_special_objects(testdir):
+    testdir.makeconftest("""
+        class DontTouchMe:
+            def __getattr__(self, x):
+                raise Exception('cant touch me')
+
+        x = DontTouchMe()
+    """)
+    testdir.makepyfile("""
+        def test_some():
+            pass
+    """)
+    res = testdir.runpytest()
+    assert res.ret == 0