[ignition] Reactivate check for jumps to unbound targets.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index c7264eac851dcbc2a30d71c15ffe95630ab120a1..5629b5cfdb7a5b7c5a8c20e23568071b66296893 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -601,6 +601,14 @@ Handle<BytecodeArray> BytecodeGenerator::MakeBytecode() {
     MakeBytecodeBody();
   }
 
+  // In generator functions, we may not have visited every yield in the AST
+  // since we skip some obviously dead code. Hence the generated bytecode may
+  // contain jumps to unbound labels (resume points that will never be used).
+  // We bind these now.
+  for (auto& label : generator_resume_points_) {
+    if (!label.is_bound()) builder()->Bind(&label);
+  }
+
   builder()->EnsureReturn();
   return builder()->ToBytecodeArray();
 }