Worker thread error demo

.github/workflows/ci.yml

@@ -126,3 +126,5 @@ jobs:
               )
             fi
         fi
+    - name: Worker threads error
+      run: node bindings/node.js/worker-threads.js

bindings/node.js/runnable.js

@@ -2,7 +2,7 @@
 
 console.log("testing...");
 
-const blst = require("blst");
+const blst = require("./blst.node");
 
 var msg = "assertion";          // this what we're signing
 var DST = "MY-DST";             // domain separation tag

bindings/node.js/worker-threads.js

@@ -0,0 +1,8 @@
+const { Worker } = require("worker_threads");
+
+// Create two workers so blst.node is imported twice to trigger the error
+// blst/bindings/node.js$ node worker-threads.js
+// Error: Module did not self-register: 'blst/bindings/node.js/blst.node'.
+
+const worker1 = new Worker("./runnable.js");
+const worker2 = new Worker("./runnable.js");