diff --git a/src/editor.js b/src/editor.js
index e94e240..e69f430 100644
--- a/src/editor.js
+++ b/src/editor.js
@@ -97,6 +97,9 @@ export class PastaMirror {
                   to = line.to + 1;
                 }
 
+                // Ensure the removal works when the cursor is on the last line
+                // see: #80
+                to = Math.min(to, view.state.doc.length);
                 const message = view.state.sliceDoc(from, to).trim();
                 doc.session._pubSubClient.publish(`session:pastagang:chat`, {
                   docId: doc.id,
diff --git a/src/strudel.js b/src/strudel.js
index d3dc753..2a9d076 100644
--- a/src/strudel.js
+++ b/src/strudel.js
@@ -192,6 +192,13 @@ export class StrudelSession {
         pattern = this.allTransform(pattern);
       }
 
+      // fix `pattern.fmap is not a function` exception,
+      // which happens when the pattern is the hubda function.
+      // TODO: figure out why this is happening, that sounds like a bug with the nudel std lib.
+      if (typeof pattern === 'function') {
+        return;
+      }
+
       // fft wiring
       if (this.enableAutoAnalyze) {
         pattern = pattern.fmap((value) => {