Fix open-network-stream responsiveness

Problem reported by Christer Ekholm (Bug#23864).
Backport from master.
* src/process.c (wait_reading_process_output):
Fix typo introduced in 2015-07-06T02:19:13Z!eggert@cs.ucla.edu
when wait == INFINITY and got_output_end_time is invalid.
In this case the code should break, not continue.

1 files changed, 14 insertions, 8 deletions

diff --git a/src/process.c b/src/process.c
index 14d7b6df1c3..05934294a04 100644
--- a/src/process.c
+++ b/src/process.c
@@ -4911,16 +4911,22 @@ wait_reading_process_output (intmax_t time_limit, int nsecs, int read_kbd,
              haven't lowered our timeout due to timers or SIGIO and
              have waited a long amount of time due to repeated
              timers.  */
+          struct timespec huge_timespec
+            = make_timespec (TYPE_MAXIMUM (time_t), 2 * TIMESPEC_RESOLUTION);
+          struct timespec cmp_time = huge_timespec;
           if (wait < TIMEOUT)
             break;
-          struct timespec cmp_time
-            = (wait == TIMEOUT
-               ? end_time
-               : (!process_skipped && got_some_output > 0
-                  && (timeout.tv_sec > 0 || timeout.tv_nsec > 0))
-               ? got_output_end_time
-               : invalid_timespec ());
-          if (timespec_valid_p (cmp_time))
+          if (wait == TIMEOUT)
+            cmp_time = end_time;
+          if (!process_skipped && got_some_output > 0
+              && (timeout.tv_sec > 0 || timeout.tv_nsec > 0))
+            {
+              if (!timespec_valid_p (got_output_end_time))
+                break;
+              if (timespec_cmp (got_output_end_time, cmp_time) < 0)
+                cmp_time = got_output_end_time;
+            }
+          if (timespec_cmp (cmp_time, huge_timespec) < 0)
             {
               now = current_timespec ();
               if (timespec_cmp (cmp_time, now) <= 0)