1 files changed, 8 insertions, 0 deletions
diff --git a/lib/internal/worker.js b/lib/internal/worker.js
index 1d1a5e7d22..6d833bcbd2 100644
--- a/lib/internal/worker.js
+++ b/lib/internal/worker.js
@@ -184,6 +184,8 @@ class Worker extends EventEmitter {
   }
 
   postMessage(...args) {
+    if (this[kPublicPort] === null) return;
+
     this[kPublicPort].postMessage(...args);
   }
 
@@ -219,14 +221,20 @@ class Worker extends EventEmitter {
   }
 
   get stdin() {
+    if (this[kParentSideStdio] === null) return null;
+
     return this[kParentSideStdio].stdin;
   }
 
   get stdout() {
+    if (this[kParentSideStdio] === null) return null;
+
     return this[kParentSideStdio].stdout;
   }
 
   get stderr() {
+    if (this[kParentSideStdio] === null) return null;
+
     return this[kParentSideStdio].stderr;
   }
 }