src/win32/javavm/runtime/sys_api_md.c

Should return FALSE if fstat fails, or perhaps nonseek available, in case
fstat returns error for a pipe (as it does on OS/2).

This error could have been detected by compiling
with compilation warning for functions not returning a value
when declared to do so.

int
sysAvailable(int fd, long *pbytes) {
    long cur, end;
    struct stat stbuf;

    if (fstat(fd, &stbuf) >= 0) {
       .
       .
       .
    }
#if defined OS2 /*ibm*/
    return FALSE; /* This would be better */
    return nonSeekAvailable(fd, pbytes); /* or this */
#endif /*ibm*/
}