8 files changed, 9 insertions, 8 deletions
diff --git a/src/librustc_codegen_ssa/lib.rs b/src/librustc_codegen_ssa/lib.rs
index 97de0d823b3..71393e224e4 100644
--- a/src/librustc_codegen_ssa/lib.rs
+++ b/src/librustc_codegen_ssa/lib.rs
@@ -14,6 +14,7 @@
 #![allow(dead_code)]
 #![deny(rust_2018_idioms)]
 #![deny(internal)]
+#![deny(unused_lifetimes)]
 #![allow(explicit_outlives_requirements)]
 
 #![recursion_limit="256"]
diff --git a/src/librustc_codegen_ssa/mir/analyze.rs b/src/librustc_codegen_ssa/mir/analyze.rs
index bb6a13ed15a..e2fd1c2bc38 100644
--- a/src/librustc_codegen_ssa/mir/analyze.rs
+++ b/src/librustc_codegen_ssa/mir/analyze.rs
@@ -272,7 +272,7 @@ impl CleanupKind {
     }
 }
 
-pub fn cleanup_kinds<'a, 'tcx>(mir: &mir::Body<'tcx>) -> IndexVec<mir::BasicBlock, CleanupKind> {
+pub fn cleanup_kinds<'tcx>(mir: &mir::Body<'tcx>) -> IndexVec<mir::BasicBlock, CleanupKind> {
     fn discover_masters<'tcx>(result: &mut IndexVec<mir::BasicBlock, CleanupKind>,
                               mir: &mir::Body<'tcx>) {
         for (bb, data) in mir.basic_blocks().iter_enumerated() {
diff --git a/src/librustc_codegen_ssa/mir/block.rs b/src/librustc_codegen_ssa/mir/block.rs
index 7e5ee25d8ef..07bfd5653ce 100644
--- a/src/librustc_codegen_ssa/mir/block.rs
+++ b/src/librustc_codegen_ssa/mir/block.rs
@@ -223,7 +223,7 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         }
     }
 
-    fn codegen_return_terminator<'b>(
+    fn codegen_return_terminator(
         &mut self,
         mut bx: Bx,
     ) {
diff --git a/src/librustc_codegen_ssa/traits/asm.rs b/src/librustc_codegen_ssa/traits/asm.rs
index a95bf3af5bf..fd3c868bbc5 100644
--- a/src/librustc_codegen_ssa/traits/asm.rs
+++ b/src/librustc_codegen_ssa/traits/asm.rs
@@ -12,6 +12,6 @@ pub trait AsmBuilderMethods<'tcx>: BackendTypes {
     ) -> bool;
 }
 
-pub trait AsmMethods<'tcx> {
+pub trait AsmMethods {
     fn codegen_global_asm(&self, ga: &GlobalAsm);
 }
diff --git a/src/librustc_codegen_ssa/traits/builder.rs b/src/librustc_codegen_ssa/traits/builder.rs
index a11d1ba9231..2af57bcb064 100644
--- a/src/librustc_codegen_ssa/traits/builder.rs
+++ b/src/librustc_codegen_ssa/traits/builder.rs
@@ -29,7 +29,7 @@ pub trait BuilderMethods<'a, 'tcx: 'a>:
     + AbiBuilderMethods<'tcx>
     + IntrinsicCallMethods<'tcx>
     + AsmBuilderMethods<'tcx>
-    + StaticBuilderMethods<'tcx>
+    + StaticBuilderMethods
     + HasParamEnv<'tcx>
     + HasTargetSpec
 
diff --git a/src/librustc_codegen_ssa/traits/mod.rs b/src/librustc_codegen_ssa/traits/mod.rs
index 2bb619e79f5..efe4a255701 100644
--- a/src/librustc_codegen_ssa/traits/mod.rs
+++ b/src/librustc_codegen_ssa/traits/mod.rs
@@ -58,7 +58,7 @@ pub trait CodegenMethods<'tcx>:
     + StaticMethods
     + DebugInfoMethods<'tcx>
     + DeclareMethods<'tcx>
-    + AsmMethods<'tcx>
+    + AsmMethods
     + PreDefineMethods<'tcx>
     + HasParamEnv<'tcx>
     + HasTyCtxt<'tcx>
@@ -74,7 +74,7 @@ impl<'tcx, T> CodegenMethods<'tcx> for T where
         + StaticMethods
         + DebugInfoMethods<'tcx>
         + DeclareMethods<'tcx>
-        + AsmMethods<'tcx>
+        + AsmMethods
         + PreDefineMethods<'tcx>
         + HasParamEnv<'tcx>
         + HasTyCtxt<'tcx>
diff --git a/src/librustc_codegen_ssa/traits/statics.rs b/src/librustc_codegen_ssa/traits/statics.rs
index d8992c15933..6983311d797 100644
--- a/src/librustc_codegen_ssa/traits/statics.rs
+++ b/src/librustc_codegen_ssa/traits/statics.rs
@@ -8,7 +8,7 @@ pub trait StaticMethods: BackendTypes {
     fn codegen_static(&self, def_id: DefId, is_mutable: bool);
 }
 
-pub trait StaticBuilderMethods<'tcx>: BackendTypes {
+pub trait StaticBuilderMethods: BackendTypes {
     fn get_static(&mut self, def_id: DefId) -> Self::Value;
     fn static_panic_msg(
         &mut self,
diff --git a/src/librustc_codegen_ssa/traits/type_.rs b/src/librustc_codegen_ssa/traits/type_.rs
index efc18d401c0..aa38d8d5184 100644
--- a/src/librustc_codegen_ssa/traits/type_.rs
+++ b/src/librustc_codegen_ssa/traits/type_.rs
@@ -101,7 +101,7 @@ pub trait LayoutTypeMethods<'tcx>: Backend<'tcx> {
     fn is_backend_immediate(&self, layout: TyLayout<'tcx>) -> bool;
     fn is_backend_scalar_pair(&self, layout: TyLayout<'tcx>) -> bool;
     fn backend_field_index(&self, layout: TyLayout<'tcx>, index: usize) -> u64;
-    fn scalar_pair_element_backend_type<'a>(
+    fn scalar_pair_element_backend_type(
         &self,
         layout: TyLayout<'tcx>,
         index: usize,