adns_processwriteable: assert that write did not write more than we asked

[adns.git] / src / event.c

diff --git a/src/event.c b/src/event.c
index 8cfaef5353b54af288e674a7d2d0c816e6dfbc0b..95386f42c4fed8351a939290cd85dcfdf5bed53b 100644 (file)
--- a/src/event.c
+++ b/src/event.c
@@ -488,6 +488,7 @@ int adns_processwriteable(adns_state ads, int fd, const struct timeval *now) {
        adns__tcp_broken(ads,"write",strerror(errno));
        r= 0; goto xit;
       } else if (r>0) {
+       assert(r <= ads->tcpsend.used);
        ads->tcpsend.used -= r;
        memmove(ads->tcpsend.buf,ads->tcpsend.buf+r,ads->tcpsend.used);
       }