Skip a few tests due to bugs in PyPy

Author: isuruf

.travis.yml

@@ -192,8 +192,6 @@ matrix:
           make pytest -j 2"
         set +ex
   allow_failures:
-    - name: PyPy 7.3, Python 2.7, c++11, gcc 4.8
-    - name: PyPy 7.3, Python 3.6, c++11, gcc 5
     - name: Python 3.9 beta, c++17, gcc 7 (w/o numpy/scipy)
 cache:
   directories:

tests/conftest.py

@@ -215,6 +215,7 @@ def pytest_configure():
     pytest.requires_eigen_and_scipy = skipif(
         not have_eigen or not scipy, reason="eigen and/or scipy are not installed")
     pytest.unsupported_on_pypy = skipif(pypy, reason="unsupported on PyPy")
+    pytest.bug_in_pypy = skipif(pypy, reason="bug in PyPy")
     pytest.unsupported_on_pypy3 = skipif(pypy and sys.version_info.major >= 3,
                                          reason="unsupported on PyPy3")
     pytest.unsupported_on_pypy_lt_6 = skipif(pypy and sys.pypy_version_info[0] < 6,

tests/test_local_bindings.py

@@ -152,6 +152,7 @@ def test_internal_locals_differ():
     assert m.local_cpp_types_addr() != cm.local_cpp_types_addr()
 
 
+@pytest.bug_in_pypy
 def test_stl_caster_vs_stl_bind(msg):
     """One module uses a generic vector caster from `<pybind11/stl.h>` while the other
     exports `std::vector<int>` via `py:bind_vector` and `py::module_local`"""

tests/test_multiple_inheritance.py

@@ -10,6 +10,7 @@ def test_multiple_inheritance_cpp():
     assert mt.bar() == 4
 
 
+@pytest.bug_in_pypy
 def test_multiple_inheritance_mix1():
     class Base1:
         def __init__(self, i):
@@ -48,7 +49,7 @@ def __init__(self, i, j):
     assert mt.foo() == 3
     assert mt.bar() == 4
 
-
+@pytest.bug_in_pypy
 def test_multiple_inheritance_python():
 
     class MI1(m.Base1, m.Base2):