diff -U3 -d -r -N pulseaudio-0.9.14/src/pulsecore/source.c pulseaudio-0.9.14.fixed/src/pulsecore/source.c
--- pulseaudio-0.9.14/src/pulsecore/source.c	2009-01-13 00:11:38.000000000 +0100
+++ pulseaudio-0.9.14.fixed/src/pulsecore/source.c	2009-04-06 22:14:12.000000000 +0200
@@ -425,7 +425,7 @@
     void *state = NULL;
 
     pa_source_assert_ref(s);
-    pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
+    pa_return_if_fail(PA_SOURCE_IS_OPENED(s->thread_info.state));
     pa_assert(chunk);
 
     if (s->thread_info.state != PA_SOURCE_RUNNING)