[bugfix] Allow datasets without mutations

See #1474 for more context
nextstrain · Feb 23, 2022 · eddc395 · eddc395
1 parent 5f36a94
commit eddc395
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/util/treeMiscHelpers.js b/src/util/treeMiscHelpers.js
@@ -173,6 +173,9 @@ export const getSeqChanges = (fromNode) => {
  */
 export const categoriseMutations = (mutations, observedMutations, seqChangesToRoot) => {
   const categorisedMutations = {};
+  if (typeof mutations !== "object") {
+    return categorisedMutations;
+  }
   for (const gene of Object.keys(mutations)) {
     const categories = { unique: [], homoplasies: [], gaps: [], reversionsToRoot: []};
     const isNuc = gene==="nuc";