From ddf4322ef281fc29e45f44aebb37785ece47a06b Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Sat, 23 Nov 2019 19:54:30 -0500
Subject: [PATCH] ignore result of `mktime`

The result of `mktime` is -1 for an error. The result is also -1 if
the time is 1 second before the epoch. That's not useful, so ignore
it.

original commit: aa8ca31cef223128fd8ed1abdc76beb31a0e077a
---
 c/stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/c/stats.c b/c/stats.c
index e254546e73..39bebd33ab 100644
--- a/c/stats.c
+++ b/c/stats.c
@@ -351,7 +351,7 @@ ptr S_gmtime(ptr tzoff, ptr tspair) {
   if (tzoff == Sfalse) {
     if (localtime_r(&tx, &tmx) == NULL) return Sfalse;
     tmx.tm_isdst = -1; /* have mktime determine the DST status */
-    if (mktime(&tmx) == (time_t)-1) return Sfalse;
+    mktime(&tmx);
     (void) adjust_time_zone(dtvec, &tmx, Sfalse);
   } else {
     tx += Sinteger_value(tzoff);