pause: avoid updating socket if done was already called

... avoids unnecesary recursive risk when the transfer is already done.

Reported-by: Richard Bowker
Fixes #4563
Closes #4574

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/easy.c b/lib/easy.c
index 001648d49..fc5eceb6a 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -1027,9 +1027,10 @@ CURLcode curl_easy_pause(struct Curl_easy *data, int action)
       Curl_update_timer(data->multi);
   }
 
-  /* This transfer may have been moved in or out of the bundle, update
-     the corresponding socket callback, if used */
-  Curl_updatesocket(data);
+  if(!data->state.done)
+    /* This transfer may have been moved in or out of the bundle, update the
+       corresponding socket callback, if used */
+    Curl_updatesocket(data);
 
   return result;
 }