patch 8.2.4699: hard to reproduce hang when reading from a channel
Problem: Hard to reproduce hang when reading from a channel.
Solution: Check for readahead before starting to wait. (closes #10093,
closes #7781, closes #6364)
diff --git a/src/channel.c b/src/channel.c
index 75fc895..f8a8194 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -3997,6 +3997,11 @@
if (channel_parse_messages())
continue;
+ // channel_parse_messages() may fill the queue with new data to
+ // process.
+ if (channel_has_readahead(channel, part))
+ continue;
+
// Wait for up to the timeout. If there was an incomplete message
// use the deadline for that.
timeout = timeout_arg;