From fb05e73a0bc7868d64dc76743f15f9efa1e88332 Mon Sep 17 00:00:00 2001
From: James Hadfield <hadfield.james@gmail.com>
Date: Wed, 23 Feb 2022 13:38:02 +1300
Subject: [PATCH] [bugfix] Allow datasets without mutations

See https://github.com/nextstrain/auspice/issues/1474 for more context
---
 src/util/treeMiscHelpers.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/util/treeMiscHelpers.js b/src/util/treeMiscHelpers.js
index dff02c07e..f4a28cdeb 100644
--- a/src/util/treeMiscHelpers.js
+++ b/src/util/treeMiscHelpers.js
@@ -239,6 +239,7 @@ export const categoriseSeqChanges = (seqChangesToRoot) => {
  */
 export const getBranchMutations = (branchNode, observedMutations) => {
   const mutations = branchNode.branch_attrs && branchNode.branch_attrs.mutations;
+  if (typeof mutations !== "object") return {};
   const seqChangesToRoot = branchNode.parent===branchNode ? {} : getSeqChanges(branchNode, mutations);
   const categorisedMutations = categoriseMutations(mutations, observedMutations, seqChangesToRoot);
   return categorisedMutations;