More Python 3.8 fixes, and another attempt at the PyPy fix.

scripts/install.sh

@@ -29,8 +29,8 @@ else
     # and it's pretty large.
     # So if we need to incorporate changes from pyenv, either temporarily
     # turn this back on, or remove the Travis caches.
-    git fetch || echo "Fetch failed to complete. Ignoring"
-    git reset --hard origin/master
+    # git fetch || echo "Fetch failed to complete. Ignoring"
+    # git reset --hard origin/master
     cd $back
 fi
 

src/gevent/_ssl3.py

@@ -162,7 +162,7 @@ class SSLContext(orig_SSLContext):
             super(orig_SSLContext, orig_SSLContext).sni_callback.__set__(self, value)
     else:
         # In newer versions, this just sets sni_callback.
-        def set_servername_callback(self, cb):
+        def set_servername_callback(self, cb): # pylint:disable=arguments-differ
             if cb and callable(cb):
                 cb = _Callback(cb)
             super().set_servername_callback(cb)

src/gevent/subprocess.py

@@ -1007,10 +1007,15 @@ class Popen(object):
             # Process startup details
             if startupinfo is None:
                 startupinfo = STARTUPINFO()
-            elif hasattr(startupinfo, '_copy'):
+            elif hasattr(startupinfo, 'copy'):
                 # bpo-34044: Copy STARTUPINFO since it is modified below,
                 # so the caller can reuse it multiple times.
+                startupinfo = startupinfo.copy()
+            elif hasattr(startupinfo, '_copy'):
+                # When the fix was backported to Python 3.7, copy() was
+                # made private as _copy.
                 startupinfo = startupinfo._copy()
+
             use_std_handles = -1 not in (p2cread, c2pwrite, errwrite)
             if use_std_handles:
                 startupinfo.dwFlags |= STARTF_USESTDHANDLES

src/gevent/tests/test__monkey_sigchld_2.py

@@ -16,6 +16,11 @@ def handle(*_args):
         os.waitpid(-1, os.WNOHANG)
 # The signal watcher must be installed *before* monkey patching
 if hasattr(signal, 'SIGCHLD'):
+    if sys.version_info[:2] >= (3, 8) and os.environ.get("PYTHONDEVMODE"):
+        # See test__monkey_sigchld.py
+        print("Ran 1 tests in 0.0s (skipped=1)")
+        sys.exit(0)
+
     # On Python 2, the signal handler breaks the platform
     # module, because it uses os.popen. pkg_resources uses the platform
     # module.

src/gevent/tests/test__monkey_sigchld_3.py

@@ -25,6 +25,11 @@ def _waitpid(p):
     assert stat == 0, stat
 
 if hasattr(signal, 'SIGCHLD'):
+    if sys.version_info[:2] >= (3, 8) and os.environ.get("PYTHONDEVMODE"):
+        # See test__monkey_sigchld.py
+        print("Ran 1 tests in 0.0s (skipped=1)")
+        sys.exit(0)
+
     # Do what subprocess does and make sure we have the watcher
     # in the parent
     get_hub().loop.install_sigchld()
@@ -50,3 +55,4 @@ if hasattr(signal, 'SIGCHLD'):
         sys.exit(0)
 else:
     print("No SIGCHLD, not testing")
+    print("Ran 1 tests in 0.0s (skipped=1)")