From 11ce5b72a21718f6d49b5f40b71ea0f53b8ea4bc Mon Sep 17 00:00:00 2001
From: topecongiro <seuchida@gmail.com>
Date: Wed, 22 Mar 2017 16:17:15 +0900
Subject: [PATCH] Make overlapping_inherent_impls lint a hard error

---
 src/librustc_lint/lib.rs                                     | 5 +----
 src/librustc_typeck/coherence/inherent_impls.rs              | 1 -
 src/librustc_typeck/diagnostics.rs                           | 1 +
 .../coherence-overlapping-inherent-impl-trait.rs             | 2 --
 src/test/compile-fail/inherent-overlap.rs                    | 3 ---
 5 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index 05dbbc0987025..8d759d89135ac 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -196,10 +196,6 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
             id: LintId::of(SUPER_OR_SELF_IN_GLOBAL_PATH),
             reference: "issue #36888 <https://github.com/rust-lang/rust/issues/36888>",
         },
-        FutureIncompatibleInfo {
-            id: LintId::of(OVERLAPPING_INHERENT_IMPLS),
-            reference: "issue #36889 <https://github.com/rust-lang/rust/issues/36889>",
-        },
         FutureIncompatibleInfo {
             id: LintId::of(ILLEGAL_FLOATING_POINT_CONSTANT_PATTERN),
             reference: "issue #36890 <https://github.com/rust-lang/rust/issues/36890>",
@@ -263,4 +259,5 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
     store.register_removed("drop_with_repr_extern", "drop flags have been removed");
     store.register_removed("transmute_from_fn_item_types",
         "always cast functions before transmuting them");
+    store.register_removed("overlapping_inherent_impls", "converted into hard error, see #36889");
 }
diff --git a/src/librustc_typeck/coherence/inherent_impls.rs b/src/librustc_typeck/coherence/inherent_impls.rs
index 3a39df505eb07..dc4bd7733fc21 100644
--- a/src/librustc_typeck/coherence/inherent_impls.rs
+++ b/src/librustc_typeck/coherence/inherent_impls.rs
@@ -322,4 +322,3 @@ impl<'a, 'tcx> InherentCollect<'a, 'tcx> {
         }
     }
 }
-
diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs
index bd6129eb5bee3..fb951fd20e564 100644
--- a/src/librustc_typeck/diagnostics.rs
+++ b/src/librustc_typeck/diagnostics.rs
@@ -4212,4 +4212,5 @@ register_diagnostics! {
            // but `{}` was found in the type `{}`
     E0567, // auto traits can not have type parameters
     E0568, // auto-traits can not have predicates,
+    E0592, // duplicate definitions with name `{}`
 }
diff --git a/src/test/compile-fail/coherence-overlapping-inherent-impl-trait.rs b/src/test/compile-fail/coherence-overlapping-inherent-impl-trait.rs
index 08e8605e91773..158d3606104a9 100644
--- a/src/test/compile-fail/coherence-overlapping-inherent-impl-trait.rs
+++ b/src/test/compile-fail/coherence-overlapping-inherent-impl-trait.rs
@@ -9,10 +9,8 @@
 // except according to those terms.
 
 #![allow(dead_code)]
-#![deny(overlapping_inherent_impls)]
 
 trait C {}
 impl C { fn f() {} } //~ ERROR duplicate definitions with name `f`
-//~^ WARN: this was previously accepted
 impl C { fn f() {} }
 fn main() { }
diff --git a/src/test/compile-fail/inherent-overlap.rs b/src/test/compile-fail/inherent-overlap.rs
index 00d41244639f5..18e77ddfd2c5b 100644
--- a/src/test/compile-fail/inherent-overlap.rs
+++ b/src/test/compile-fail/inherent-overlap.rs
@@ -17,7 +17,6 @@ struct Foo;
 
 impl Foo {
     fn id() {} //~ ERROR duplicate definitions
-    //~^ WARN previously accepted
 }
 
 impl Foo {
@@ -28,7 +27,6 @@ struct Bar<T>(T);
 
 impl<T> Bar<T> {
     fn bar(&self) {} //~ ERROR duplicate definitions
-    //~^ WARN previously accepted
 }
 
 impl Bar<u32> {
@@ -39,7 +37,6 @@ struct Baz<T>(T);
 
 impl<T: Copy> Baz<T> {
     fn baz(&self) {} //~ ERROR duplicate definitions
-    //~^ WARN previously accepted
 }
 
 impl<T> Baz<Vec<T>> {