--- www/node012/files/patch-deps_v8_src_compiler_instruction.h	(nonexistent)
+++ www/node012/files/patch-deps_v8_src_compiler_instruction.h	(working copy)
@@ -0,0 +1,11 @@ 
+--- deps/v8/src/compiler/instruction.h.orig	2016-03-16 21:22:58.000000000 +0100
++++ deps/v8/src/compiler/instruction.h	2016-03-24 23:27:23.004854000 +0100
+@@ -1011,7 +1011,7 @@ class InstructionBlock final : public Zo
+ 
+ typedef ZoneDeque<Constant> ConstantDeque;
+ typedef std::map<int, Constant, std::less<int>,
+-                 zone_allocator<std::pair<int, Constant> > > ConstantMap;
++                 zone_allocator<std::pair<const int, Constant> > > ConstantMap;
+ 
+ typedef ZoneDeque<Instruction*> InstructionDeque;
+ typedef ZoneDeque<ReferenceMap*> ReferenceMapDeque;