253     strm->opaque = Z_NULL;  in mem_done()
254     strm->zalloc = Z_NULL;  in mem_done()
255     strm->zfree = Z_NULL;  in mem_done()
317     strm.next_in = Z_NULL;  in inf()
379     strm.next_in = Z_NULL;  in cover_support()
384     ret = inflateSetDictionary(&strm, Z_NULL, 0);  in cover_support()
397     strm.next_in = Z_NULL;  in cover_support()
403     strm.next_in = Z_NULL;  in cover_support()
416     ret = inflate(Z_NULL, 0);                   assert(ret == Z_STREAM_ERROR);  in cover_wrap()
417     ret = inflateEnd(Z_NULL);                   assert(ret == Z_STREAM_ERROR);  in cover_wrap()
418     ret = inflateCopy(Z_NULL, Z_NULL);          assert(ret == Z_STREAM_ERROR);  in cover_wrap()
437     strm.next_in = Z_NULL;  in cover_wrap()
475     if (desc == Z_NULL) {  in pull()
480     if (state != Z_NULL)  in pull()
488     return desc != Z_NULL;      /* force error if desc not null */  in push()
498     ret = inflateBackInit_(Z_NULL, 0, win, 0, 0);  in cover_back()
500     ret = inflateBackInit(Z_NULL, 0, win);      assert(ret == Z_STREAM_ERROR);  in cover_back()
501     ret = inflateBack(Z_NULL, Z_NULL, Z_NULL, Z_NULL, Z_NULL);  in cover_back()
503     ret = inflateBackEnd(Z_NULL);               assert(ret == Z_STREAM_ERROR);  in cover_back()
510     ret = inflateBack(&strm, pull, Z_NULL, push, Z_NULL);  in cover_back()
515     ret = inflateBack(&strm, pull, Z_NULL, push, &strm);  in cover_back()
518     ret = inflateBack(&strm, pull, &strm, push, Z_NULL);  in cover_back()
555     strm.next_in = Z_NULL;
584         ret = inflateBack(&strm, pull, Z_NULL, push, Z_NULL);