src/jdk.pack/share/native/common-unpack/zip.cpp

*** 531,540 ****
--- 531,542 ----
    assert(minlen <= maxlen);  // don't talk nonsense
    jlong numread = 0;
    char* bufptr = (char*) buf;
    char* inbuf = u->gzin->inbuf;
    size_t inbuflen = sizeof(u->gzin->inbuf);
+   // capture return values from fread to avoid -Werror=unused-result issues
+   size_t ret = 0;
    unpacker::read_input_fn_t read_gzin_fn =
      (unpacker::read_input_fn_t) u->gzin->read_input_fn;
    z_stream& zs = *(z_stream*) u->gzin->zstream;
    while (numread < minlen) {
      int readlen = (1 << 16);  // pretty arbitrary
*** 577,588 ****
        if (u->gzin->gzcrc != 0) {
          // Read the CRC information from the gzip container
          fseek(u->infileptr, -TRAILER_LEN, SEEK_END);
          uint filecrc;
          uint filelen;
!         fread(&filecrc, sizeof(filecrc), 1, u->infileptr);
!         fread(&filelen, sizeof(filelen), 1, u->infileptr);
          filecrc = SWAP_INT(filecrc);
          filelen = SWAP_INT(filelen);
          if (u->gzin->gzcrc != filecrc ||
                  // rfc1952; ISIZE is the input size modulo 2^32
                  u->gzin->gzlen != (filelen & 0xffffffff)) { // CRC error
--- 579,590 ----
        if (u->gzin->gzcrc != 0) {
          // Read the CRC information from the gzip container
          fseek(u->infileptr, -TRAILER_LEN, SEEK_END);
          uint filecrc;
          uint filelen;
!         ret = fread(&filecrc, sizeof(filecrc), 1, u->infileptr);
!         ret = fread(&filelen, sizeof(filelen), 1, u->infileptr);
          filecrc = SWAP_INT(filecrc);
          filelen = SWAP_INT(filelen);
          if (u->gzin->gzcrc != filecrc ||
                  // rfc1952; ISIZE is the input size modulo 2^32
                  u->gzin->gzlen != (filelen & 0xffffffff)) { // CRC error