Rakefile

```
file "a.txt" do
  system "echo hello > a.txt"
end

file "b.txt" => "a.txt" do
  system "cp a.txt b.txt"
end

task :default => "b.txt"
```

```
$ touch b.txt
$ ruby minirake --trace
Invoke default (already=[], needed=[true])
rake aborted!
No such file or directory @ rb_file_s_stat - a.txt
minirake:241:in `stat'
minirake:241:in `timestamp'
minirake:233:in `block in needed?'
minirake:233:in `collect'
minirake:233:in `needed?'
minirake:91:in `invoke'
minirake:95:in `block in invoke'
minirake:95:in `each'
minirake:95:in `invoke'
minirake:467:in `block in run'
minirake:466:in `each'
minirake:466:in `run'
minirake:484:in `<main>'
```

http://hkdnet.hatenablog.com/entry/2017/02/06/080000 (Japanese)

Now `eval()` can call Fiber.yield etc.

Calling `mrb_funcall()` and `mrb_yield()` (and their related
functions) are discouraged unless absolutely necessary, because
it can cause this kind of issues very easily.

Fix usage of Class#name in mruby-bin-mruby's bintest

Fetch arguments earlier in mrb_random_init to avoid a crash.

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