[Issue 19331] std.regex.internal.ir.SmallFixedArray.toHash is ignored because it's non-const

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19331

--- Comment #2 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/phobos

https://github.com/dlang/phobos/commit/725278b2ceb06dee2ccd5899d10a0ca1f542fec3
Fix Issue 19331 - std.regex.internal.ir.SmallFixedArray.toHash is ignored
because it's non-const

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