[Issue 19256] std.json: JSONValue allows violating constness

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19256

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

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--- Comment #4 from Dlang Bot <dlang-bot at dlang.rocks> ---
@FeepingCreature updated dlang/phobos pull request #6716 "Fix issue 19256:
prevent JSONValue const conversion" fixing this issue:

- std.json: Fix issue 19256, prevent auto JSONValue = const(JSONValue)
  Reorder JSONValue's union members to make dmd realize that JSONValue contains
const references and disallows reassigning const(JSONValue) to JSONValue, which
would break constness.
  This works around https://issues.dlang.org/show_bug.cgi?id=12885 .

https://github.com/dlang/phobos/pull/6716

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