@@ -206,6 +206,9 @@ unique_vstring(PyArrayObject *self, bool equal_nan)
206206 PyArray_Descr *descr =PyArray_DESCR (self);
207207// NumPy API calls and Python object manipulations require holding the GIL.
208208Py_INCREF (descr);
209+
210+ // variables for the vstring, this operation require holding the GIL.
211+ npy_string_allocator *in_allocator =NpyString_acquire_allocator ((PyArray_StringDTypeObject *)descr);
209212 NPY_DISABLE_C_API;
210213
211214// release the GIL
@@ -214,11 +217,6 @@ unique_vstring(PyArrayObject *self, bool equal_nan)
214217// number of elements in the input array
215218 npy_intp isize =PyArray_SIZE (self);
216219
217- // variables for the vstring
218- npy_string_allocator *in_allocator =NpyString_acquire_allocator ((PyArray_StringDTypeObject *)descr);
219- auto in_allocator_dealloc =finally ([&]() {
220- NpyString_release_allocator (in_allocator);
221- });
222220auto hash = [equal_nan](const npy_static_string *value) ->size_t {
223221if (value->buf ==NULL ) {
224222if (equal_nan) {
@@ -298,19 +296,13 @@ unique_vstring(PyArrayObject *self, bool equal_nan)
298296// NumPy API calls and Python object manipulations require holding the GIL.
299297Py_INCREF (res_descr);
300298 std::cerr <<" res_descr incremented successfully."
299+ npy_string_allocator *out_allocator =NpyString_acquire_allocator ((PyArray_StringDTypeObject *)res_descr);
301300 NPY_DISABLE_C_API;
302301 PyThreadState *_save2 =PyEval_SaveThread ();
303302 std::cerr <<" save2:" void *)_save2 << std::endl;
304- auto save2_dealloc =finally ([&]() {
305- PyEval_RestoreThread (_save2);
306- });
307303 std::cerr <<" save2_dealloc completed successfully."
308304
309- npy_string_allocator *out_allocator =NpyString_acquire_allocator ((PyArray_StringDTypeObject *)res_descr);
310305 std::cerr <<" out_allocator:" void *)out_allocator << std::endl;
311- auto out_allocator_dealloc =finally ([&]() {
312- NpyString_release_allocator (out_allocator);
313- });
314306 std::cerr <<" out_allocator_dealloc completed successfully."
315307
316308char *odata =PyArray_BYTES ((PyArrayObject *)res_obj);
@@ -332,6 +324,12 @@ unique_vstring(PyArrayObject *self, bool equal_nan)
332324 }
333325 }
334326 std::cerr <<" Packing loop completed successfully."
327+ PyEval_RestoreThread (_save2);
328+ NPY_ALLOW_C_API;
329+ // these operations require holding the GIL
330+ NpyString_release_allocator (in_allocator);
331+ NpyString_release_allocator (out_allocator);
332+ NPY_DISABLE_C_API;
335333
336334return res_obj;
337335}