file.c: do not rescan packets is no capture file is opened

Otherwise we will end up calling cf_cb_file_rescan_started and cf_cb_file_rescan_finished callbacks while no capture file is available

Bug: 11552
Change-Id: Ib6fd7b13ce1b083d5f5b4e05d80152112c1451f6
Reviewed-on: https://code.wireshark.org/review/10692
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/file.c b/file.c
index fdbd4073e4..c97194f6e9 100644
--- a/file.c
+++ b/file.c
@@ -1471,10 +1471,12 @@ cf_filter_packets(capture_file *cf, gchar *dftext, gboolean force)
 
   /* Now rescan the packet list, applying the new filter, but not
      throwing away information constructed on a previous pass. */
-  if (dftext == NULL) {
-    rescan_packets(cf, "Resetting", "Filter", FALSE);
-  } else {
-    rescan_packets(cf, "Filtering", dftext, FALSE);
+  if (cf->state != FILE_CLOSED) {
+    if (dftext == NULL) {
+      rescan_packets(cf, "Resetting", "Filter", FALSE);
+    } else {
+      rescan_packets(cf, "Filtering", dftext, FALSE);
+    }
   }
 
   /* Cleanup and release all dfilter resources */