From b18485e3ac15b5d5b7be8d7117fef9994b745bf8 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Thu, 20 Jun 2024 15:24:24 -0400
Subject: [PATCH] fix: properly mark the C extension as safe for
 free-threading. #1799

https://github.com/python/cpython/blob/main/Doc/howto/free-threading-extensions.rst#c-api-extension-support-for-free-threading
---
 .github/workflows/python-nightly.yml | 5 -----
 coverage/ctracer/module.c            | 4 ++++
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/python-nightly.yml b/.github/workflows/python-nightly.yml
index 72427def9..59a74b3c7 100644
--- a/.github/workflows/python-nightly.yml
+++ b/.github/workflows/python-nightly.yml
@@ -86,11 +86,6 @@ jobs:
       - name: "Check out the repo"
         uses: "actions/checkout@v4"
 
-      - name: "Set PYTHON_GIL"
-        if: "${{ matrix.nogil }}"
-        run: |
-          echo "PYTHON_GIL=0" >> $GITHUB_ENV
-
       - name: "Install ${{ matrix.python-version }} with deadsnakes"
         uses: deadsnakes/action@6c8b9b82fe0b4344f4b98f2775fcc395df45e494
         if: "!startsWith(matrix.python-version, 'pypy-')"
diff --git a/coverage/ctracer/module.c b/coverage/ctracer/module.c
index d564a8128..33b50e64f 100644
--- a/coverage/ctracer/module.c
+++ b/coverage/ctracer/module.c
@@ -31,6 +31,10 @@ PyInit_tracer(void)
         return NULL;
     }
 
+#ifdef Py_GIL_DISABLED
+    PyUnstable_Module_SetGIL(mod, Py_MOD_GIL_NOT_USED);
+#endif
+
     if (CTracer_intern_strings() < 0) {
         return NULL;
     }