[Issue 22359] joiner over an empty forward range object liable to segfault

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22359

Dlang Bot <dlang-bot at dlang.rocks> changed:

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--- Comment #3 from Dlang Bot <dlang-bot at dlang.rocks> ---
@adamdruppe created dlang/phobos pull request #8263 "Fix issue #22359." fixing
this issue:

- Fix issue #22359.

  If you pass it a range of class-based ranges, the initialization to
  `typeof(_current).init` will be `null`. Calling the `save` method
  on `null` will naturally be a memory violation. This generic check
  will handle null without harming any other type since save of any
  init value will be another init value.

https://github.com/dlang/phobos/pull/8263

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