Merged branch subtype-trunk into default.

diff --cc src/vm/class.cpp
Simple merge

diff --cc src/vm/jit/alpha/codegen.c
Simple merge

diff --cc src/vm/jit/builtin.cpp
Simple merge

diff --cc src/vm/jit/builtin.hpp
Simple merge

diff --cc src/vm/jit/i386/codegen.c
Simple merge

diff --cc src/vm/jit/i386/emit.c
Simple merge

diff --cc src/vm/jit/i386/patcher.c
Simple merge

diff --cc src/vm/jit/x86_64/codegen.c
Simple merge

diff --cc src/vm/jit/x86_64/emit.c
Simple merge

diff --cc src/vm/linker.cpp
Simple merge