+++ ./src/os/unix/pa_unix_util.h
@@ -153,6 +153,7 @@
     pthread_cond_t cond;
     PaUtilClockId condClockId;
     volatile sig_atomic_t stopRequest;
+    int stopped;
 } PaUnixThread;
 
 /** Initialize global threading state.
+++ ./src/os/unix/pa_unix_util.c
@@ -424,6 +424,8 @@
     {
         *exitResult = paNoError;
     }
+    if (self->stopped)
+		return paNoError;
 #if 0
     if( watchdogExitResult )
         *watchdogExitResult = paNoError;
@@ -473,6 +475,7 @@
 error:
     PA_ASSERT_CALL( PaUnixMutex_Terminate( &self->mtx ), paNoError );
     PA_ASSERT_CALL( pthread_cond_destroy( &self->cond ), 0 );
+    self->stopped = 1;
 
     return result;
 }