diff --git a/tests/incremental/print-dep-node-cycle.rs b/tests/incremental/print-dep-node-cycle.rs new file mode 100644 index 000000000000..931d3da521e5 --- /dev/null +++ b/tests/incremental/print-dep-node-cycle.rs @@ -0,0 +1,25 @@ +//@ compile-flags: -Z query-dep-graph +//@ revisions: rpass1 + +// Exercises a debug-assertions-only query cycle that when printing a valtree const in +// a dep node's debug representation, we end up invoking a query that also has a valtree +// const in its dep node's debug representation, which leads to a cycle (and ICE, since +// deps are not tracked when printing dep nodes' debug representations). + +#![feature(adt_const_params)] + +use std::marker::ConstParamTy; + +#[derive(Debug, ConstParamTy, PartialEq, Eq)] +enum Foo { + A1, +} + +#[inline(never)] +fn hello() { + println!("{:#?}", F); +} + +fn main() { + hello::<{ Foo::A1 }>(); +}