diff --git a/pagure/ui/issues.py b/pagure/ui/issues.py
index b8752f4..51bda42 100644
--- a/pagure/ui/issues.py
+++ b/pagure/ui/issues.py
@@ -92,21 +92,21 @@ def update_issue(repo, issueid, username=None):
                     'Could not remove the comment: %s' % commentid, 'error')
 
         comment = form.comment.data
-        try:
-            depends = [
-                int(depend.strip())
-                for depend in form.depends.data.split(',')
-                if depend.strip()]
-        except ValueError:
-            depends = []
-
-        try:
-            blocks = [
-                int(block.strip())
-                for block in form.blocks.data.split(',')
-                if block.strip()]
-        except ValueError:
-            blocks = []
+        depends = []
+        for depend in form.depends.data.split(','):
+            if depend.strip():
+                try:
+                    depends.append(int(depend.strip()))
+                except ValueError:
+                    pass
+
+        blocks = []
+        for block in form.blocks.data.split(','):
+            if block.strip():
+                try:
+                    blocks.append(int(block.strip()))
+                except ValueError:
+                    pass
 
         assignee = form.assignee.data
         new_status = form.status.data