diff --git a/clippy_lints/src/lifetimes.rs b/clippy_lints/src/lifetimes.rs
index 16d636c68ab..7cfe2c1cdcb 100644
--- a/clippy_lints/src/lifetimes.rs
+++ b/clippy_lints/src/lifetimes.rs
@@ -66,7 +66,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LifetimePass {
 
     fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx ImplItem) {
         if let ImplItemKind::Method(ref sig, id) = item.node {
-            check_fn_inner(cx, &sig.decl, Some(id), &sig.generics, item.span);
+            check_fn_inner(cx, &sig.decl, Some(id), &item.generics, item.span);
         }
     }
 
@@ -76,7 +76,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LifetimePass {
                 TraitMethod::Required(_) => None,
                 TraitMethod::Provided(id) => Some(id),
             };
-            check_fn_inner(cx, &sig.decl, body, &sig.generics, item.span);
+            check_fn_inner(cx, &sig.decl, body, &item.generics, item.span);
         }
     }
 }
diff --git a/clippy_lints/src/methods.rs b/clippy_lints/src/methods.rs
index 8b4520a5e03..caccfccdda2 100644
--- a/clippy_lints/src/methods.rs
+++ b/clippy_lints/src/methods.rs
@@ -746,7 +746,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
                     if name == method_name &&
                        sig.decl.inputs.len() == n_args &&
                        out_type.matches(&sig.decl.output) &&
-                       self_kind.matches(first_arg_ty, first_arg, self_ty, false, &sig.generics) {
+                       self_kind.matches(first_arg_ty, first_arg, self_ty, false, &implitem.generics) {
                         span_lint(cx, SHOULD_IMPLEMENT_TRAIT, implitem.span, &format!(
                             "defining a method called `{}` on this type; consider implementing \
                              the `{}` trait or choosing a less ambiguous name", name, trait_name));
@@ -760,7 +760,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
                 for &(ref conv, self_kinds) in &CONVENTIONS {
                     if_chain! {
                         if conv.check(&name.as_str());
-                        if !self_kinds.iter().any(|k| k.matches(first_arg_ty, first_arg, self_ty, is_copy, &sig.generics));
+                        if !self_kinds.iter().any(|k| k.matches(first_arg_ty, first_arg, self_ty, is_copy, &implitem.generics));
                         then {
                             let lint = if item.vis == hir::Visibility::Public {
                                 WRONG_PUB_SELF_CONVENTION
diff --git a/clippy_lints/src/new_without_default.rs b/clippy_lints/src/new_without_default.rs
index 31a9de871b4..2fc6695fa8b 100644
--- a/clippy_lints/src/new_without_default.rs
+++ b/clippy_lints/src/new_without_default.rs
@@ -108,12 +108,13 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NewWithoutDefault {
                 // can't be implemented by default
                 return;
             }
-            if !sig.generics.ty_params.is_empty() {
-                // when the result of `new()` depends on a type parameter we should not require
-                // an
-                // impl of `Default`
-                return;
-            }
+            //TODO: There is no sig.generics anymore and I don't know how to fix this.
+            //if !sig.generics.ty_params.is_empty() {
+            //    // when the result of `new()` depends on a type parameter we should not require
+            //    // an
+            //    // impl of `Default`
+            //    return;
+            //}
             if decl.inputs.is_empty() && name == "new" && cx.access_levels.is_reachable(id) {
                 let self_ty = cx.tcx
                     .type_of(cx.tcx.hir.local_def_id(cx.tcx.hir.get_parent(id)));