1149 	}

  1149 	}

  1150 

  1150 

  1151 	/* Initialize internal datastructures */

  1151 	/* Initialize internal datastructures */

  1152 	tovisit = (int *)malloc((len + 1) * sizeof(int));

  1152 	tovisit = (int *)malloc((len + 1) * sizeof(int));

  1153 	if (tovisit == NULL) {

  1153 	if (tovisit == NULL) {

  1155 		goto release_reachable;

  1155 		goto release_reachable;

  1156 	}

  1156 	}

  1157 

  1157 

  1158 	seen = (char *)calloc(len+1, 1);

  1158 	seen = (char *)calloc(len+1, 1);

  1159 	if (seen == NULL) {

  1159 	if (seen == NULL) {

  1161 		goto release_seen_and_tovisit;

  1161 		goto release_seen_and_tovisit;

  1162 	}

  1162 	}

  1163 

  1163 

  1164 	/* Populate tovisit with all the heads */

  1164 	/* Populate tovisit with all the heads */

  1165 	numheads = PyList_GET_SIZE(heads);

  1165 	numheads = PyList_GET_SIZE(heads);