commits: add protection against 500 errors on commit children/parents page.

rhodecode/apps/repository/views/repo_commits.py

@@ -535,8 +535,13 b' class RepoCommitsView(RepoAppView):'
         commit_id = self.request.matchdict['commit_id']
         self.load_default_context()
 
+        try:
         commit = self.rhodecode_vcs_repo.get_commit(commit_id=commit_id)
-        result = {"results": commit.children}
+            children = commit.children
+        except CommitDoesNotExistError:
+            children = []
+
+        result = {"results": children}
         return result
 
     @LoginRequired()
@@ -549,6 +554,10 b' class RepoCommitsView(RepoAppView):'
         commit_id = self.request.matchdict['commit_id']
         self.load_default_context()
 
+        try:
         commit = self.rhodecode_vcs_repo.get_commit(commit_id=commit_id)
-        result = {"results": commit.parents}
+            parents = commit.parents
+        except CommitDoesNotExistError:
+            parents = []
+        result = {"results": parents}
         return result