issue-80074 test should not compile

[Mark-Simulacrum]

The test in https://github.com/rust-lang/rust/blob/master/tests/ui/extern/issue-80074.rs shouldn't actually compile -- it's using a non-exported macro from a foreign crate. Instead, we should get an error indicating that the name is private and/or that the name doesn't exist at all.

Likely a regression introduced by #88019.

See discussion in https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/cross-crate.20macro.20usage.20allowed.20with.20no.20macro_export.3F

[apiraino]

WG-prioritization assigning priority (Zulip discussion).

The question now is what happens if we revert/change this behaviour. What could the impact be (as an option, this could be discussed in a triage meeting)

@rustbot label -I-prioritize +P-high

[bvanjoi]

An interesting issue. I will attempt to resolve it.

@rustbot claim