gh-127314: Don't mention the GIL when calling without a thread state on the free-threaded build (#127315)

Co-authored-by: Victor Stinner <vstinner@python.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index 2cc0377..b103deb 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -2910,9 +2910,16 @@ static inline void
 _PyMem_DebugCheckGIL(const char *func)
 {
     if (!PyGILState_Check()) {
+#ifndef Py_GIL_DISABLED
         _Py_FatalErrorFunc(func,
                            "Python memory allocator called "
                            "without holding the GIL");
+#else
+        _Py_FatalErrorFunc(func,
+                           "Python memory allocator called "
+                           "without an active thread state. "
+                           "Are you trying to call it inside of a Py_BEGIN_ALLOW_THREADS block?");
+#endif
     }
 }