[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 #5 from Dlang Bot <dlang-bot at dlang.rocks> ---
dlang/phobos pull request #8140 "Issue 19842 - only class member functions must
be used be used as slots" was merged into stable:

- 235d3ba9bedf8cd7a9f697231b03f37bac9fd7d3 by Ate Eskola:
  Issue 19842 - only class member functions must be used be used as slots

https://github.com/dlang/phobos/pull/8140

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