From: "nobu (Nobuyoshi Nakada)" <noreply@...>
Date: 2022-01-26T16:03:09+00:00
Subject: [ruby-core:107293] [Ruby master Bug#18517] 0 << (2**40) is NoMemoryError but 0 << (2**80) is 0

Issue #18517 has been updated by nobu (Nobuyoshi Nakada).


https://github.com/ruby/ruby/pull/5494

----------------------------------------
Bug #18517: 0 << (2**40) is NoMemoryError but 0 << (2**80) is 0
https://bugs.ruby-lang.org/issues/18517#change-96157

* Author: Eregon (Benoit Daloze)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux]
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
I've been looking at Integer#{<<,>>} with RHS bignum and long and there are several issues.

This seems a clear bug though:
```
$ruby -e 'p 0 << (2**40)'
-e: failed to allocate memory (NoMemoryError)
$ ruby -e 'p 0 << (2**80)'
0
```



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