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Victor Stinner  committed cb392bc

Partial revert of changeset 9744b2df134c

PyUnicode_Append() cannot call directly resize_compact(): I forgot that a
string can be ready *and* not compact (a legacy string can also be ready).

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  • Parent commits 3e02d70

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File Objects/unicodeobject.c

         && !(PyUnicode_IS_ASCII(left) && !PyUnicode_IS_ASCII(right)))
     {
         /* append inplace */
-        res = resize_compact(left, new_len);
-        if (res == NULL)
+        if (unicode_resize(p_left, new_len) != 0)
             goto error;
 
-        /* copy 'right' into the newly allocated area of 'res' (left) */
-        _PyUnicode_FastCopyCharacters(res, left_len, right, 0, right_len);
+        /* copy 'right' into the newly allocated area of 'left' */
+        _PyUnicode_FastCopyCharacters(*p_left, left_len, right, 0, right_len);
     }
     else {
         maxchar = PyUnicode_MAX_CHAR_VALUE(left);
         _PyUnicode_FastCopyCharacters(res, 0, left, 0, left_len);
         _PyUnicode_FastCopyCharacters(res, left_len, right, 0, right_len);
         Py_DECREF(left);
-    }
-    *p_left = res;
+        *p_left = res;
+    }
     assert(_PyUnicode_CheckConsistency(*p_left, 1));
     return;