Debugging pylint crash; try moving to 3.10

I do not reproduce locally on mac, with matching pylint and astroid versions.

See https://github.com/gevent/gevent/actions/runs/3042157082/jobs/5192451149

.github/workflows/ci.yml

@@ -145,7 +145,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [2.7, pypy-2.7, pypy-3.7, 3.6, 3.7, 3.8, 3.9, '3.10.0']
+        python-version: [2.7, pypy-2.7, pypy-3.7, 3.6, 3.7, 3.8, 3.9, '3.10']
         # ubuntu-latest is at least 20.04. But this breaks the SSL
         # tests because Ubuntu increased the default OpenSSL
         # strictness.
@@ -174,7 +174,7 @@ jobs:
           - os: ubuntu-18.04
             python-version: 3.9
           - os: ubuntu-18.04
-            python-version: '3.10.0'
+            python-version: '3.10'
     steps:
       - name: checkout
         uses: actions/checkout@v2
@@ -299,8 +299,8 @@ jobs:
           python -c 'import gevent.core; print(gevent.core.loop)'
           python -c 'import gevent.ares; print(gevent.ares)'
           ccache -s
-      - name: Lint (Python 3.9)
-        if: matrix.python-version == 3.9 && startsWith(runner.os, 'Linux')
+      - name: Lint (Python 3)
+        if: matrix.python-version == '3.10' && startsWith(runner.os, 'Linux')
         # We only need to do this on one version, and it should be Python 3, because
         # pylint has stopped updating for Python 2.
         # We do this here rather than a separate job to avoid the compilation overhead.
@@ -328,14 +328,14 @@ jobs:
           python -m gevent.tests --second-chance $G_USE_COV `(cd src/gevent/tests >/dev/null && ls test__*subprocess*.py)`
       - name: "Tests: c-ares resolver"
         # This sometimes fails on mac. Also, save mac minutes.
-        if: (matrix.python-version == 2.7 || matrix.python-version == 3.9) && startsWith(runner.os, 'Linux')
+        if: (matrix.python-version == 2.7 || matrix.python-version == '3.10') && startsWith(runner.os, 'Linux')
         env:
           GEVENT_RESOLVER: ares
         run: |
           python -mgevent.tests --second-chance $G_USE_COV --ignore tests_that_dont_use_resolver.txt
       - name: "Tests: dnspython resolver"
         # This has known issues on Pypy-3.6. Also, save mac minutes.
-        if: (matrix.python-version == 2.7 || matrix.python-version == 3.9) && startsWith(runner.os, 'Linux')
+        if: (matrix.python-version == 2.7 || matrix.python-version == '3.10') && startsWith(runner.os, 'Linux')
         env:
           GEVENT_RESOLVER: dnspython
         run: |
@@ -351,19 +351,19 @@ jobs:
       - name: "Tests: PURE_PYTHON"
         # No compiled cython modules on CPython, using the default backend. Get coverage here.
         # We should only need to run this for a single Python 2 and a Python 3
-        if: (matrix.python-version == 2.7 || matrix.python-version == 3.9) && startsWith(runner.os, 'Linux')
+        if: (matrix.python-version == 2.7 || matrix.python-version == '3.10') && startsWith(runner.os, 'Linux')
         env:
           PURE_PYTHON: 1
         run: |
           python -mgevent.tests --second-chance --coverage
       - name: "Tests: libuv"
-        if: (matrix.python-version == 2.7 || matrix.python-version == 3.9)
+        if: (matrix.python-version == 2.7 || matrix.python-version == '3.10')
         env:
           GEVENT_LOOP: libuv
         run: |
           python -m gevent.tests --second-chance $G_USE_COV
       - name: "Tests: libev-cffi"
-        if: (matrix.python-version == 2.7 || matrix.python-version == 3.9) && startsWith(runner.os, 'Linux')
+        if: (matrix.python-version == 2.7 || matrix.python-version == '3.10') && startsWith(runner.os, 'Linux')
         env:
           GEVENT_LOOP: libev-cffi
         run: |
@@ -393,7 +393,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [2.7, 3.9]
+        python-version: [2.7, '3.10']
         os: [ubuntu-18.04]
     steps:
       - name: checkout