diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c index 45128d32b8e..26c6e461005 100644 --- a/Modules/posixmodule.c +++ b/Modules/posixmodule.c @@ -3762,15 +3762,18 @@ To both, return fd of newly opened pseudo-terminal.\n"); static PyObject * posix_forkpty(PyObject *self, PyObject *noargs) { - int master_fd = -1, result; + int master_fd = -1, result = 0; pid_t pid; _PyImport_AcquireLock(); pid = forkpty(&master_fd, NULL, NULL, NULL); - if (pid == 0) + if (pid == 0) { + /* child: this clobbers and resets the import lock. */ PyOS_AfterFork(); - - result = _PyImport_ReleaseLock(); + } else { + /* parent: release the import lock. */ + result = _PyImport_ReleaseLock(); + } if (pid == -1) return posix_error(); if (result < 0) {