Don't emit the lazy deopt sequence when we can't deopt.

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
diff --git a/runtime/vm/flow_graph_compiler_x64.cc b/runtime/vm/flow_graph_compiler_x64.cc
index de1b9444fe6ce55892d59d56d716cb7a923f6b59..bf1c3126c28c72f8c3489d86d4ab6c5e266e0811 100644
--- a/runtime/vm/flow_graph_compiler_x64.cc
+++ b/runtime/vm/flow_graph_compiler_x64.cc
@@ -1128,7 +1128,7 @@ void FlowGraphCompiler::CompileGraph() {
   // Emit function patching code. This will be swapped with the first 13 bytes
   // at entry point.
 
-  if (is_optimizing()) {
+  if (is_optimizing() && Compiler::allow_recompilation()) {
     // Leave enough space for patching in case of lazy deoptimization from
     // deferred code.
     __ nop(ShortCallPattern::pattern_length_in_bytes());