diff --git a/Shell/AST.cpp b/Shell/AST.cpp
index a1096eccd0..11f03c4ec2 100644
--- a/Shell/AST.cpp
+++ b/Shell/AST.cpp
@@ -1287,9 +1287,11 @@ RefPtr<Value> Sequence::run(RefPtr<Shell> shell)
     // If we are to return a job, block on the left one then return the right one.
     if (would_execute()) {
         RefPtr<AST::Node> execute_node = create<AST::Execute>(m_left->position(), m_left);
-        auto left_job = execute_node->run(shell);
-        ASSERT(left_job->is_job());
-        shell->block_on_job(static_cast<JobValue*>(left_job.ptr())->job());
+        auto left_value = execute_node->run(shell);
+        // Some nodes are inherently empty, such as Comments and For loops without bodies,
+        // it is not an error for the value not to be a job.
+        if (left_value && left_value->is_job())
+            shell->block_on_job(static_cast<JobValue*>(left_value.ptr())->job());
 
         if (m_right->would_execute())
             return m_right->run(shell);
diff --git a/Shell/AST.h b/Shell/AST.h
index 9873bbbca8..3021940a11 100644
--- a/Shell/AST.h
+++ b/Shell/AST.h
@@ -589,6 +589,7 @@ private:
     virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
     virtual HitTestResult hit_test_position(size_t) override;
     virtual String class_name() const override { return "ForLoop"; }
+    virtual bool would_execute() const override { return true; }
 
     String m_variable_name;
     RefPtr<AST::Node> m_iterated_expression;