patch 7.4.1623
Problem: All Channels share the message ID, it keeps getting bigger.
Solution: Use a message ID per channel.
diff --git a/src/proto/channel.pro b/src/proto/channel.pro
index be11a3a..b98fb58 100644
--- a/src/proto/channel.pro
+++ b/src/proto/channel.pro
@@ -24,10 +24,9 @@
char_u *channel_peek(channel_T *channel, int part);
void channel_clear(channel_T *channel);
void channel_free_all(void);
-int channel_get_id(void);
void channel_read(channel_T *channel, int part, char *func);
char_u *channel_read_block(channel_T *channel, int part, int timeout);
-int channel_read_json_block(channel_T *channel, int part, int timeout, int id, typval_T **rettv);
+int channel_read_json_block(channel_T *channel, int part, int timeout_arg, int id, typval_T **rettv);
void common_channel_read(typval_T *argvars, typval_T *rettv, int raw);
channel_T *channel_fd2channel(sock_T fd, int *partp);
void channel_handle_events(void);