[Issue 19842] std.signals Segfault when connecting with a lambda

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19842

--- Comment #6 from Dlang Bot <dlang-bot at dlang.rocks> ---
@MartinNowak created dlang/phobos pull request #8172 "merge stable" mentioning
this issue:

- Issue 19842 - only class member functions must be used be used as slots

https://github.com/dlang/phobos/pull/8172

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