Merge remote-tracking branch 'upstream/stable' into merge_stable

[MartinNowak]

No description provided.

[dlang-bot]

Thanks for your pull request, @MartinNowak!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✗	18657	normal	std.range and std.algorithm can't handle refRange
✓	18818	regression	VariantN has unittests that are compiled into user modules
✓	19765	normal	std.algorithm.searching.findAmong doesn't save like it should

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub fetch digger
dub run digger -- build "master + phobos#6943"

[wilzbach]

Looks like the RefRange changes make relativePath no longer save:

std/path.d(359): Error: `@safe` function `std.path.__unittest_L353_C7` cannot call `@system` function `std.path.relativePath!cast(CaseSensitive)false.relativePath`
std/path.d(2886):        `std.path.relativePath!cast(CaseSensitive)false.relativePath` is declared here

[aG0aep6G]

Looks like the RefRange changes make relativePath no longer save:

std/path.d(359): Error: `@safe` function `std.path.__unittest_L353_C7` cannot call `@system` function `std.path.relativePath!cast(CaseSensitive)false.relativePath`
std/path.d(2886):        `std.path.relativePath!cast(CaseSensitive)false.relativePath` is declared here

I've looked into this. PR: #6950

[wilzbach]

Closing in favor of #6951