diff --git a/tests/source/big-impl.rs b/tests/source/big-impl.rs
new file mode 100644
index 00000000000..c36b7e6cadb
--- /dev/null
+++ b/tests/source/big-impl.rs
@@ -0,0 +1,104 @@
+// #1357
+impl<
+    'a,
+    Select,
+    From,
+    Distinct,
+    Where,
+    Order,
+    Limit,
+    Offset,
+    Groupby,
+    DB,
+> InternalBoxedDsl<'a, DB>
+    for SelectStatement<
+        Select,
+        From,
+        Distinct,
+        Where,
+        Order,
+        Limit,
+        Offset,
+        GroupBy,
+    > where
+        DB: Backend,
+        Select: QueryFragment<DB> + SelectableExpression<From> + 'a,
+        Distinct: QueryFragment<DB> + 'a,
+        Where: Into<Option<Box<QueryFragment<DB> + 'a>>>,
+        Order: QueryFragment<DB> + 'a,
+        Limit: QueryFragment<DB> + 'a,
+        Offset: QueryFragment<DB> + 'a,
+{
+    type Output = BoxedSelectStatement<'a, Select::SqlTypeForSelect, From, DB>;
+
+    fn internal_into_boxed(self) -> Self::Output {
+        BoxedSelectStatement::new(
+            Box::new(self.select),
+            self.from,
+            Box::new(self.distinct),
+            self.where_clause.into(),
+            Box::new(self.order),
+            Box::new(self.limit),
+            Box::new(self.offset),
+        )
+    }
+}
+
+// #1369
+impl<
+    ExcessivelyLongGenericName,
+      ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> Foo for Bar {
+    fn foo() {}
+}
+impl Foo<
+    ExcessivelyLongGenericName,
+      ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> for Bar {
+    fn foo() {}
+}
+impl<
+    ExcessivelyLongGenericName,
+    ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> Foo<
+    ExcessivelyLongGenericName,
+      ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> for Bar {
+    fn foo() {}
+}
+impl<
+    ExcessivelyLongGenericName,
+      ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> Foo for Bar<
+    ExcessivelyLongGenericName,
+    ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> {
+    fn foo() {}
+}
+impl Foo<
+    ExcessivelyLongGenericName,
+      ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> for Bar<
+    ExcessivelyLongGenericName,
+    ExcessivelyLongGenericName,
+    AnotherExcessivelyLongGenericName,
+> {
+    fn foo() {}
+}
+impl<ExcessivelyLongGenericName,
+     ExcessivelyLongGenericName,
+     AnotherExcessivelyLongGenericName> Foo<ExcessivelyLongGenericName,
+                                            ExcessivelyLongGenericName,
+                                            AnotherExcessivelyLongGenericName>
+    for Bar<ExcessivelyLongGenericName,
+            ExcessivelyLongGenericName,
+            AnotherExcessivelyLongGenericName> {
+    fn foo() {}
+}
diff --git a/tests/source/impls.rs b/tests/source/impls.rs
index 1c38a2ff284..17588fb9d35 100644
--- a/tests/source/impls.rs
+++ b/tests/source/impls.rs
@@ -122,3 +122,20 @@ impl<ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNodeFoo> Issue1249<ConcreteTh
 impl<#[may_dangle] K, #[may_dangle] V> Drop for RawTable<K, V> {
     fn drop() {}
 }
+
+// #1168
+pub trait Number: Copy + Eq +      Not<Output = Self> + Shl<u8, Output = Self> +
+    Shr<u8, Output = Self>       +
+    BitAnd<Self, Output=Self> +    BitOr<Self, Output=Self>  + BitAndAssign + BitOrAssign
+
+
+
+{
+    // test
+    fn zero() -> Self;
+}
+
+// #1642
+pub trait SomeTrait : Clone + Eq + PartialEq + Ord + PartialOrd + Default + Hash + Debug + Display + Write + Read + FromStr {
+    // comment
+}
diff --git a/tests/target/big-impl-rfc.rs b/tests/target/big-impl-rfc.rs
index 18fa59cb5a0..108968faaed 100644
--- a/tests/target/big-impl-rfc.rs
+++ b/tests/target/big-impl-rfc.rs
@@ -5,7 +5,7 @@
 
 // #1357
 impl<'a, Select, From, Distinct, Where, Order, Limit, Offset, Groupby, DB> InternalBoxedDsl<'a, DB>
-for SelectStatement<Select, From, Distinct, Where, Order, Limit, Offset, GroupBy>
+    for SelectStatement<Select, From, Distinct, Where, Order, Limit, Offset, GroupBy>
 where
     DB: Backend,
     Select: QueryFragment<DB> + SelectableExpression<From> + 'a,
@@ -32,11 +32,11 @@ where
 
 // #1369
 impl<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> Foo
-for Bar {
+    for Bar {
     fn foo() {}
 }
 impl Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
-for Bar {
+    for Bar {
     fn foo() {}
 }
 impl<
@@ -44,15 +44,23 @@ impl<
     ExcessivelyLongGenericName,
     AnotherExcessivelyLongGenericName,
 > Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
-for Bar {
+    for Bar {
     fn foo() {}
 }
 impl<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> Foo
-for Bar<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> {
+    for Bar<
+        ExcessivelyLongGenericName,
+        ExcessivelyLongGenericName,
+        AnotherExcessivelyLongGenericName,
+    > {
     fn foo() {}
 }
 impl Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
-for Bar<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> {
+    for Bar<
+        ExcessivelyLongGenericName,
+        ExcessivelyLongGenericName,
+        AnotherExcessivelyLongGenericName,
+    > {
     fn foo() {}
 }
 impl<
@@ -60,6 +68,10 @@ impl<
     ExcessivelyLongGenericName,
     AnotherExcessivelyLongGenericName,
 > Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
-for Bar<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> {
+    for Bar<
+        ExcessivelyLongGenericName,
+        ExcessivelyLongGenericName,
+        AnotherExcessivelyLongGenericName,
+    > {
     fn foo() {}
 }
diff --git a/tests/target/big-impl.rs b/tests/target/big-impl.rs
new file mode 100644
index 00000000000..afe2571ec68
--- /dev/null
+++ b/tests/target/big-impl.rs
@@ -0,0 +1,62 @@
+// #1357
+impl<'a, Select, From, Distinct, Where, Order, Limit, Offset, Groupby, DB> InternalBoxedDsl<'a, DB>
+    for SelectStatement<Select, From, Distinct, Where, Order, Limit, Offset, GroupBy>
+    where DB: Backend,
+          Select: QueryFragment<DB> + SelectableExpression<From> + 'a,
+          Distinct: QueryFragment<DB> + 'a,
+          Where: Into<Option<Box<QueryFragment<DB> + 'a>>>,
+          Order: QueryFragment<DB> + 'a,
+          Limit: QueryFragment<DB> + 'a,
+          Offset: QueryFragment<DB> + 'a
+{
+    type Output = BoxedSelectStatement<'a, Select::SqlTypeForSelect, From, DB>;
+
+    fn internal_into_boxed(self) -> Self::Output {
+        BoxedSelectStatement::new(Box::new(self.select),
+                                  self.from,
+                                  Box::new(self.distinct),
+                                  self.where_clause.into(),
+                                  Box::new(self.order),
+                                  Box::new(self.limit),
+                                  Box::new(self.offset))
+    }
+}
+
+// #1369
+impl<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> Foo
+    for Bar {
+    fn foo() {}
+}
+impl Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
+    for Bar {
+    fn foo() {}
+}
+impl<ExcessivelyLongGenericName,
+     ExcessivelyLongGenericName,
+     AnotherExcessivelyLongGenericName> Foo<ExcessivelyLongGenericName,
+                                            ExcessivelyLongGenericName,
+                                            AnotherExcessivelyLongGenericName> for Bar {
+    fn foo() {}
+}
+impl<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName> Foo
+    for Bar<ExcessivelyLongGenericName,
+            ExcessivelyLongGenericName,
+            AnotherExcessivelyLongGenericName> {
+    fn foo() {}
+}
+impl Foo<ExcessivelyLongGenericName, ExcessivelyLongGenericName, AnotherExcessivelyLongGenericName>
+    for Bar<ExcessivelyLongGenericName,
+            ExcessivelyLongGenericName,
+            AnotherExcessivelyLongGenericName> {
+    fn foo() {}
+}
+impl<ExcessivelyLongGenericName,
+     ExcessivelyLongGenericName,
+     AnotherExcessivelyLongGenericName> Foo<ExcessivelyLongGenericName,
+                                            ExcessivelyLongGenericName,
+                                            AnotherExcessivelyLongGenericName>
+    for Bar<ExcessivelyLongGenericName,
+            ExcessivelyLongGenericName,
+            AnotherExcessivelyLongGenericName> {
+    fn foo() {}
+}
diff --git a/tests/target/impls.rs b/tests/target/impls.rs
index f8b9f43aeb0..654d4be8967 100644
--- a/tests/target/impls.rs
+++ b/tests/target/impls.rs
@@ -126,8 +126,8 @@ mod m {
     impl<T> PartialEq for S<T> where T: PartialEq {}
 }
 
-impl<BorrowType, K, V, NodeType, HandleType> Handle<NodeRef<BorrowType, K, V, NodeType>,
-                                                    HandleType> {
+impl<BorrowType, K, V, NodeType, HandleType>
+    Handle<NodeRef<BorrowType, K, V, NodeType>, HandleType> {
 }
 
 impl<BorrowType, K, V, NodeType, HandleType> PartialEq
@@ -154,3 +154,35 @@ impl<ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNodeFoo>
 impl<#[may_dangle] K, #[may_dangle] V> Drop for RawTable<K, V> {
     fn drop() {}
 }
+
+// #1168
+pub trait Number
+    : Copy
+    + Eq
+    + Not<Output = Self>
+    + Shl<u8, Output = Self>
+    + Shr<u8, Output = Self>
+    + BitAnd<Self, Output = Self>
+    + BitOr<Self, Output = Self>
+    + BitAndAssign
+    + BitOrAssign {
+    // test
+    fn zero() -> Self;
+}
+
+// #1642
+pub trait SomeTrait
+    : Clone
+    + Eq
+    + PartialEq
+    + Ord
+    + PartialOrd
+    + Default
+    + Hash
+    + Debug
+    + Display
+    + Write
+    + Read
+    + FromStr {
+    // comment
+}