Fix lazy deoptimization from deferred code.

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
diff --git a/runtime/vm/flow_graph_compiler_ia32.cc b/runtime/vm/flow_graph_compiler_ia32.cc
index e4481b7496f5ee66d7c616f9dfd7203aed7f31a1..a8e9da5637e2a90e7c2fd2710d8ca71d1af58ccf 100644
--- a/runtime/vm/flow_graph_compiler_ia32.cc
+++ b/runtime/vm/flow_graph_compiler_ia32.cc
@@ -15,6 +15,7 @@
 #include "vm/deopt_instructions.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/il_printer.h"
+#include "vm/instructions.h"
 #include "vm/locations.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
@@ -1128,6 +1129,9 @@ void FlowGraphCompiler::CompileGraph() {
   GenerateDeferredCode();
 
   if (is_optimizing()) {
+    // Leave enough space for patching in case of lazy deoptimization from
+    // deferred code.
+    __ nop(CallPattern::pattern_length_in_bytes());
     lazy_deopt_pc_offset_ = assembler()->CodeSize();
     __ Jmp(*StubCode::DeoptimizeLazy_entry());
   }