[Issue 12727] [REG2.066a] DMD hangs up on recursive alias declaration

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12727

--- Comment #5 from github-bugzilla at puremagic.com ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/fbd78c3db2c2c03ec098c1b433431d7f3f144ef7
fix Issue 12727 - DMD hangs up on recursive alias declaration

By the commit fd1762c33ac034ad3112e69f21421b5c75b3cc6c, now static-if
declaration does nothing in `addMembers` phase, and conditional eponymous
template instance cannot raise "recursive alias declaration" error in
`TemplateInstance::semantic`, because `TemplateInstance::aliasdecl` is not set
until the end of it.

By looking for circular aliasing not only in `AliasDeclaration::semantic` but
also in `AliasDeclaration::toAlias`, we can defer the detection until
appropriate timing.

https://github.com/D-Programming-Language/dmd/commit/402efb34eba5e45f20a1b05850eac3647f6e635c
Merge pull request #3545 from 9rnsr/fix12727

[REG2.066a] Issue 12727 - DMD hangs up on recursive alias declaration

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