tests/ui/crashes/ice-6840.rs

   1 //! This is a reproducer for the ICE 6840: https://github.com/rust-lang/rust-clippy/issues/6840.
   2 //! The ICE is caused by `TyCtxt::layout_of` and `is_normalizable` not being strict enough
   3 #![allow(dead_code)]
   4 use std::collections::HashMap;
   5
   6 pub trait Rule {
   7     type DependencyKey;
   8 }
   9
  10 pub struct RuleEdges<R: Rule> {
  11     dependencies: R::DependencyKey,
  12 }
  13
  14 type RuleDependencyEdges<R> = HashMap<u32, RuleEdges<R>>;
  15
  16 // reproducer from the GitHub issue ends here
  17 //   but check some additional variants
  18 type RuleDependencyEdgesArray<R> = HashMap<u32, [RuleEdges<R>; 8]>;
  19 type RuleDependencyEdgesSlice<R> = HashMap<u32, &'static [RuleEdges<R>]>;
  20 type RuleDependencyEdgesRef<R> = HashMap<u32, &'static RuleEdges<R>>;
  21 type RuleDependencyEdgesRaw<R> = HashMap<u32, *const RuleEdges<R>>;
  22 type RuleDependencyEdgesTuple<R> = HashMap<u32, (RuleEdges<R>, RuleEdges<R>)>;
  23
  24 // and an additional checks to make sure fix doesn't have stack-overflow issue
  25 //   on self-containing types
  26 pub struct SelfContaining {
  27     inner: Box<SelfContaining>,
  28 }
  29 type SelfContainingEdges = HashMap<u32, SelfContaining>;
  30
  31 fn main() {}