Adapt rustc_data_structures tests to run in strict miri

Some tests took too long and owning_ref is fundamentally flawed,
so don't run these tests or run them with a shorter N. This makes
miri with `-Zmiri-strict-provenance` usable to find UB.

1 files changed, 4 insertions, 0 deletions

diff --git a/compiler/rustc_data_structures/src/owning_ref/tests.rs b/compiler/rustc_data_structures/src/owning_ref/tests.rs
index 7b8179e90bd..320c03d5139 100644
--- a/compiler/rustc_data_structures/src/owning_ref/tests.rs
+++ b/compiler/rustc_data_structures/src/owning_ref/tests.rs
@@ -1,3 +1,5 @@
+// FIXME: owning_ref is not sound under stacked borrows. Preferably, get rid of it.
+#[cfg(not(miri))]
 mod owning_ref {
     use super::super::OwningRef;
     use super::super::{BoxRef, Erased, ErasedBoxRef, RcRef};
@@ -361,6 +363,8 @@ mod owning_handle {
     }
 }
 
+// FIXME: owning_ref is not sound under stacked borrows. Preferably, get rid of it.
+#[cfg(not(miri))]
 mod owning_ref_mut {
     use super::super::BoxRef;
     use super::super::{BoxRefMut, Erased, ErasedBoxRefMut, OwningRefMut};