This reverts commit a6b50f37.

Under some Ext4 filesystem settings, a timestamp is limited up to
0x37fffffff (2446-05-10).

https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout#Inode_Timestamps
> Therefore, timestamps should not overflow until May 2446.

Actually the spec fails under one of our CI environments, like:

```
1)
File.utime allows Time instances in the far future to set mtime and atime FAILED
Expected 2446 == 559444
to be truthy but was false
```
https://rubyci.org/logs/rubyci.s3.amazonaws.com/arch/ruby-master/log/20200208T180002Z.fail.html.gz

to prevent a random failure like
http://ci.rvm.jp/results/trunk-random2@phosphorus-docker/3024287

A test worker process may already be enabling TracePoint, which results
in changing the insn name in this test.

http://ci.rvm.jp/results/trunk-random0@phosphorus-docker/3022750

	Added `NODE_SPECIAL_EXCESSIVE_COMMA` info to `ARGS` of
	 `RubyVM::AbstractSyntaxTree`.

	Trace :return of builtin methods

	using opt_invokebuiltin_delegate_leave insn.

	Since Ruby 2.7, :return of methods using builtin have not been traced properly.

	Check type of empty keyword [Bug #16603]
Co-authored-by: NYusuke Endoh <mame@ruby-lang.org>

[Backport #16771]

This reverts commit 0d24fb77.

	Add operator info to `OP_ASGN2` of `RubyVM::AbstractSyntaxTree`.

	Fixed `defined?` against protected method call

	Protected methods are restricted to be called according to the
	class/module in where it is defined, not the actual receiver's
	class.  [Bug #16931]

	Hash#transform_values should return a plain new Hash

	[Bug #16498]

	Classes made from Struct should have default new singleton method.

	Co-authored-by: Yusuke Endoh mame@ruby-lang.org
	Co-authored-by: John Hawthorn john@hawthorn.email
	Co-authored-by: Adam Hess HParker@github.com
	Co-authored-by: Jose Cortinas jacortinas@gmail.com
	Co-authored-by: Jean Boussier jean.boussier@gmail.com

merge revision(s) a0bc3f2a,75a0447c,f1699314: [Backport #16846]

	Suppress C4267 "possible loss of data" warnings

	Suppress C4267 "possible loss of data" warnings

	Just cast down explicitly.

	win32ole: separate global variable declarations and definitions

	https://gcc.gnu.org/gcc-10/changes.html#c

	> * GCC now defaults to `-fno-common`.  As a result, global
	>   variable accesses are more efficient on various targets.  In
	>   C, global variables with multiple tentative definitions now
	>   result in linker errors.  With `-fcommon` such definitions are
	>   silently merged during linking.

	Ignore exceptions when closing data connections [Bug #16780]

	Patch by koshigoe (Masataka SUZUKI). Thanks!

	Fix rb_profile_frame_classpath to handle module singletons

	Right now `SomeClass.method` is properly named, but `SomeModule.method`
	is displayed as `#<Module:0x000055eb5d95adc8>.method` which makes
	profiling annoying.

	Fixed argument forwarding in reserved word method [Bug #16854]

	Compare environment variable names in those manor [Bug #16798]

	Fixed formatted substring expansion [Bug #16767]

	Fix source location of autoloaded constant [Bug #16764]

	Update to ruby/spec@cc7b9e5

	Moved not-implemented method tests [Bug #16662]

	Test not-implemented method with the dedicated methods, instead of
	platform dependent features.

	marshal.c: Support dump and load of a Hash with the ruby2_keywords
	 flag

	It is useful for a program that dumps and load arguments (like drb).
	In future, they should deal with both positional arguments and keyword
	ones explicitly, but until ruby2_keywords is deprecated, it is good to
	support the flag in marshal.

	The implementation is similar to String's encoding; it is dumped as a
	hidden instance variable.

	[Feature #16501]

	[ruby/uri] Check if DN exists

	https://bugs.ruby-lang.org/issues/16830

	https://github.com/ruby/uri/commit/b4bf8c1217