ref #3411

This issue was first reported by https://hackerone.com/geeknik
The fix was proposed by @titanous

The fix was proposed by @titanous

This issue was reported by https://hackerone.com/ston3

Refactoring: Use array_copy instead of for loop

The new API is:

int mrb_range_beg_len(mrb, range, &beg, &len, len, trunc)

The new argument `trunc` is a boolean value that specifies
whether the function truncates the range. The new return value
is an integer instead of a boolean, that is:

 0: not a range
 1: range with proper edges
 2: out of range

To get the old behavior, you have to rewrite:

  mrb_range_beg_len(mrb, range, &beg, &len, len)

to:

  mrn_range_beg_len(mrb, range, &beg, &len, len, TRUE) == 1

[Breaking Change]

ref #3409

Rewrite mrb_ary_splice

Should raise RuntimeError when object frozen

Referenced to CRuby's array.c(rb_ary_splice)

fix #3405

Fix incorrect parsing of block parameters.

This issue was reported by https://hackerone.com/titanous

Remove problematic optimization from NODE_MASGN codegen

Proc shouldn't have `initialize` method

Implement Kernel.#caller

This issue was reported by https://hackerone.com/ssarong

This issue was reported by https://hackerone.com/icanthack
The solution is suggested by @clayton-shopify.

Fix broken MRB_INT64

Fix 36fc1f14 not checking in the right location