From 8e600f46d9f4a58c648d8b2dd3927db1f7841df8 Mon Sep 17 00:00:00 2001
From: Max Goodhart <c@chromakode.com>
Date: Thu, 2 Jul 2020 13:59:28 -0700
Subject: [PATCH] Fix crash when attempting to id empty stream

---
 src/node/data.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/node/data.js b/src/node/data.js
index f9a2cf7..28f97b8 100644
--- a/src/node/data.js
+++ b/src/node/data.js
@@ -84,7 +84,12 @@ export class StreamIDGenerator {
       if (!localIdMap.has(link)) {
         let counter = 0
         let newId
-        const normalizedText = (source || label || link)
+        const idBase = source || label || link
+        if (!idBase) {
+          console.warn('skipping empty stream', stream)
+          continue
+        }
+        const normalizedText = idBase
           .toLowerCase()
           .replace(/[^\w]/g, '')
           .replace(/^the|^https?(www)?/, '')