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On 7/18/2017 6:41 PM, Ken Brown wrote:
On 7/18/2017 3:21 PM, Achim Gratz wrote:Corinna Vinschen writes:Oh, and a plain C testcase, of course...Call that fflush.c: --8<---------------cut here---------------start------------->8--- #include <stdio.h> int main(int argc, char **argv) { char buf[1024]; int i; char *bp = buf; while (1) { while ((i = getc(stdin)) != -1 && (*bp++ = i) != '\n' && bp < &buf[1024]) /* DO NOTHING */ ; *bp = '\0'; fprintf(stdout, "%s", buf); fflush(NULL); if (i == -1) return 0; bp = buf; } } --8<---------------cut here---------------end--------------->8--- Then run: gcc fflush.c -o fflush cat fflush.c | ./fflush 2>/dev/null > fflush.out diff fflush.c fflush.out If things are working, fflush.c and fflush.out should be identical. Currently only the first line makes it into fflush.out on Cygwin.I've checked that the 2017-03-08 snapshot is good and the 2017-03-10 snapshot is bad. I'll bisect further when I get a chance
Done: 44b1746a41921533d27aca414a9188314cb725b6 is the first bad commit commit 44b1746a41921533d27aca414a9188314cb725b6 Author: Corinna Vinschen <corinna@vinschen.de> Date: Fri Mar 10 20:21:09 2017 +0100 errno: Stop using _impure_ptr->_errno completely We use errno AKA _REENT->_errno since the last century and only set _impure_ptr->_errno for backward compat. Stop that. Also, remove the last check for _impure_ptr->_errno in Cygwin code. Ken
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