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-rw-r--r--main/channel.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/main/channel.c b/main/channel.c
index 17a489fe6..f40099045 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -2578,15 +2578,20 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
goto done;
}
- if (chan->fdno == -1) {
#ifdef AST_DEVMODE
+ /*
+ * The ast_waitfor() code records which of the channel's file descriptors reported that
+ * data is available. In theory, ast_read() should only be called after ast_waitfor()
+ * reports that a channel has data available for reading. However, there still may be
+ * some edge cases throughout the code where ast_read() is called improperly. This can
+ * potentially cause problems, so if this is a developer build, make a lot of noise if
+ * this happens so that it can be addressed.
+ */
+ if (chan->fdno == -1) {
ast_log(LOG_ERROR, "ast_read() called with no recorded file descriptor.\n");
-#else
- ast_debug(2, "ast_read() called with no recorded file descriptor.\n");
-#endif
- f = &ast_null_frame;
- goto done;
}
+#endif
+
prestate = chan->_state;
/* Read and ignore anything on the alertpipe, but read only