mirror of https://github.com/rust-lang/rust
90 lines
2.2 KiB
Rust
90 lines
2.2 KiB
Rust
//@ compile-flags: -Znext-solver
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// A regression test for #125269. We previously ended up
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// recursively proving `&<_ as SpeciesPackedElem>::Assoc: Typed`
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// for all aliases which ended up causing exponential blowup.
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//
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// This has been fixed by eagerly normalizing the associated
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// type before computing the nested goals, resulting in an
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// immediate inductive cycle.
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pub trait Typed {}
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pub struct SpeciesCases<E>(E);
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pub trait SpeciesPackedElim {
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type Ogre;
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type Cyclops;
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type Wendigo;
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type Cavetroll;
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type Mountaintroll;
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type Swamptroll;
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type Dullahan;
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type Werewolf;
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type Occultsaurok;
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type Mightysaurok;
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type Slysaurok;
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type Mindflayer;
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type Minotaur;
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type Tidalwarrior;
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type Yeti;
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type Harvester;
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type Blueoni;
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type Redoni;
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type Cultistwarlord;
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type Cultistwarlock;
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type Huskbrute;
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type Tursus;
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type Gigasfrost;
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type AdletElder;
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type SeaBishop;
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type HaniwaGeneral;
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type TerracottaBesieger;
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type TerracottaDemolisher;
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type TerracottaPunisher;
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type TerracottaPursuer;
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type Cursekeeper;
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}
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impl<'b, E: SpeciesPackedElim> Typed for &'b SpeciesCases<E>
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where
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&'b E::Ogre: Typed,
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&'b E::Cyclops: Typed,
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&'b E::Wendigo: Typed,
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&'b E::Cavetroll: Typed,
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&'b E::Mountaintroll: Typed,
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&'b E::Swamptroll: Typed,
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&'b E::Dullahan: Typed,
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&'b E::Werewolf: Typed,
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&'b E::Occultsaurok: Typed,
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&'b E::Mightysaurok: Typed,
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&'b E::Slysaurok: Typed,
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&'b E::Mindflayer: Typed,
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&'b E::Minotaur: Typed,
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&'b E::Tidalwarrior: Typed,
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&'b E::Yeti: Typed,
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&'b E::Harvester: Typed,
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&'b E::Blueoni: Typed,
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&'b E::Redoni: Typed,
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&'b E::Cultistwarlord: Typed,
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&'b E::Cultistwarlock: Typed,
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&'b E::Huskbrute: Typed,
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&'b E::Tursus: Typed,
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&'b E::Gigasfrost: Typed,
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&'b E::AdletElder: Typed,
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&'b E::SeaBishop: Typed,
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&'b E::HaniwaGeneral: Typed,
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&'b E::TerracottaBesieger: Typed,
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&'b E::TerracottaDemolisher: Typed,
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&'b E::TerracottaPunisher: Typed,
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&'b E::TerracottaPursuer: Typed,
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&'b E::Cursekeeper: Typed,
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{}
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fn foo<T: Typed>() {}
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fn main() {
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foo::<&_>();
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//~^ ERROR overflow evaluating the requirement `&_: Typed`
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}
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