QR decode: memleak might be fixed

c_mpos/src/quirc_decode.c

@@ -142,7 +142,8 @@ static mp_obj_t qrdecode_rgb565(mp_uint_t n_args, const mp_obj_t *args) {
         mp_obj_new_int(height)
     };
 
-    mp_obj_t result = MP_OBJ_NULL;
+    //mp_obj_t result = MP_OBJ_NULL;
+    mp_obj_t result = mp_const_none;
     nlr_buf_t exception_handler;
     if (nlr_push(&exception_handler) == 0) {
         result = qrdecode(3, gray_args);
@@ -152,8 +153,8 @@ static mp_obj_t qrdecode_rgb565(mp_uint_t n_args, const mp_obj_t *args) {
     } else {
         QRDECODE_DEBUG_PRINT("qrdecode_rgb565: Exception caught, freeing gray_buffer\n");
         free(gray_buffer);
-        nlr_pop();
-        nlr_raise(exception_handler.ret_val);
+        //nlr_pop();
+        //nlr_raise(exception_handler.ret_val);
     }
 
     return result;

internal_filesystem/apps/com.example.camtest/assets/camtest.py

@@ -54,12 +54,15 @@ def qrdecode_live():
         try:
             import qrdecode
             result = qrdecode.qrdecode_rgb565(current_cam_buffer, width, height)
-            #raise ValueError('A very specific bad thing happened.')
-            result = remove_bom(result)
-            result = print_qr_buffer(result)
-            print(f"QR decoding found: {result}")
-            status_label_text = result
-            stop_qr_decoding()
+            if not result:
+                status_label_text = status_label_text_searching
+            else:
+                #raise ValueError('A very specific bad thing happened.')
+                result = remove_bom(result)
+                result = print_qr_buffer(result)
+                print(f"QR decoding found: {result}")
+                status_label_text = result
+                stop_qr_decoding()
         except ValueError as e:
             print("QR ValueError: ", e)
             status_label_text = status_label_text_searching