Write one error message directly to stderr instead of sys.stderr. This

lets us avoid taking the GIL, which might crash in case the Python
interpreter is not initialized at all.

1 files changed, 2 insertions, 10 deletions

diff --git a/testing/cffi1/test_recompiler.py b/testing/cffi1/test_recompiler.py
index ee77c5c..81c43ef 100644
--- a/testing/cffi1/test_recompiler.py
+++ b/testing/cffi1/test_recompiler.py
@@ -4,7 +4,7 @@ from cffi import FFI, VerificationError, FFIError
 from cffi import recompiler
 from testing.udir import udir
 from testing.support import u
-from StringIO import StringIO
+from testing.support import FdWriteCapture, StdErrCapture
 
 
 def check_type_table(input, expected_output, included=None):
@@ -1486,14 +1486,6 @@ def test_win32_calling_convention_3():
     pt = ptr_call2(ffi.addressof(lib, 'cb2'))
     assert (pt.x, pt.y) == (99*500*999, -99*500*999)
 
-class StdErrCapture(object):
-    def __enter__(self):
-        self.old_stderr = sys.stderr
-        sys.stderr = f = StringIO()
-        return f
-    def __exit__(self, *args):
-        sys.stderr = self.old_stderr
-
 def test_extern_python_1():
     ffi = FFI()
     ffi.cdef("""
@@ -1506,7 +1498,7 @@ def test_extern_python_1():
     """)
     lib = verify(ffi, 'test_extern_python_1', "")
     assert ffi.typeof(lib.bar) == ffi.typeof("int(*)(int, int)")
-    with StdErrCapture() as f:
+    with FdWriteCapture() as f:
         res = lib.bar(4, 5)
     assert res == 0
     assert f.getvalue() == (