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-rw-r--r--compiler/rustc_next_trait_solver/src/lib.rs6
1 files changed, 6 insertions, 0 deletions
diff --git a/compiler/rustc_next_trait_solver/src/lib.rs b/compiler/rustc_next_trait_solver/src/lib.rs
index b913a05095c..144caf36ee5 100644
--- a/compiler/rustc_next_trait_solver/src/lib.rs
+++ b/compiler/rustc_next_trait_solver/src/lib.rs
@@ -1,3 +1,9 @@
+//! Crate containing the implementation of the next-generation trait solver.
+//!
+//! This crate may also contain things that are used by the old trait solver,
+//! but were uplifted in the process of making the new trait solver generic.
+//! So if you got to this crate from the old solver, it's totally normal.
+
 pub mod canonicalizer;
 pub mod resolve;
 pub mod solve;