2 files changed, 6 insertions, 5 deletions

diff --git a/crates/ra_hir_ty/Cargo.toml b/crates/ra_hir_ty/Cargo.toml
index e891d733f..177bdbcb0 100644
--- a/crates/ra_hir_ty/Cargo.toml
+++ b/crates/ra_hir_ty/Cargo.toml
@@ -27,9 +27,9 @@ test_utils = { path = "../test_utils" }
 
 scoped-tls = "1"
 
-chalk-solve =   { git = "https://github.com/rust-lang/chalk.git", rev = "6222e416b96892b2a86bc08de7dbc9826ff1acea" }
-chalk-rust-ir = { git = "https://github.com/rust-lang/chalk.git", rev = "6222e416b96892b2a86bc08de7dbc9826ff1acea" }
-chalk-ir =      { git = "https://github.com/rust-lang/chalk.git", rev = "6222e416b96892b2a86bc08de7dbc9826ff1acea" }
+chalk-solve =   { git = "https://github.com/rust-lang/chalk.git", rev = "28cef6ff403d403e6ad2f3d27d944e9ffac1bce8" }
+chalk-rust-ir = { git = "https://github.com/rust-lang/chalk.git", rev = "28cef6ff403d403e6ad2f3d27d944e9ffac1bce8" }
+chalk-ir =      { git = "https://github.com/rust-lang/chalk.git", rev = "28cef6ff403d403e6ad2f3d27d944e9ffac1bce8" }
 
 [dev-dependencies]
 insta = "0.16.0"
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index 55eb0ffcb..b43e2a539 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -795,8 +795,9 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
     fn well_known_trait_id(
         &self,
         _well_known_trait: chalk_rust_ir::WellKnownTrait,
-    ) -> chalk_ir::TraitId<Interner> {
-        unimplemented!()
+    ) -> Option<chalk_ir::TraitId<Interner>> {
+        // FIXME tell Chalk about well-known traits (here and in trait_datum)
+        None
     }
 }