Add exception test

Remove use of mruby-proc-ext method in core test.

Pacify MSVC warnings for time.c

Refactoring test to use assert_nothing_raised.

Move `__method__` to mruby-kernel-ext since it's not ISO method.

libreadline requires libtermcap on OpenBSD.

OP_ENTER clean block object in register

Add ISO No. to String#inspect test.

Add Hash#key

Add tests for Range#to_s Range#inspect.

fix typo

Replace from include <>, to include "".

Make Array#[]= raise IndexError.

If second param is negative, Array#[] raise IndexError.

Remove `Time` defined check in mruby-time gem test.

Fix build on mingw32/64: struct timeval isn't defined in default. See: 6...

Fix build on mingw32/64: struct timeval isn't defined in default. See: 642477ef

Implement Kernel.fail and Kernel#fail .

OP_ENTER fix variable assignment

Add a comment to ObjectSpace.each_object.