[ruby-core:111510] [Ruby master Bug#19284] Integer overflow when using RUBY_GC_HEAP_INIT_SLOTS environment variable

Issue #19284 has been reported by zeke (Zeke Gabrielse).

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Bug #19284: Integer overflow when using RUBY_GC_HEAP_INIT_SLOTS environment variable
https://bugs.ruby-lang.org/issues/19284

* Author: zeke (Zeke Gabrielse)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.0 (2022-12-25 revision a528908271) [x86_64-darwin19]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
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If you set the environment variable `RUBY_GC_HEAP_INIT_SLOTS` to anything other than `0`, an integer overflow runtime error occurs:

```ruby
RUBY_GC_HEAP_INIT_SLOTS=2 ruby -e 'puts "hello, world!"'
# => integer overflow: 3689348814741910508 * 8 > 18446744073709551615 (RuntimeError)
```

At this time, I'm not sure if this is platform-specific.



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