diff options
| -rw-r--r-- | compiler/src/dotty/tools/dotc/core/Types.scala | 7 | ||||
| -rw-r--r-- | tests/pos/i2051.scala | 2 |
2 files changed, 6 insertions, 3 deletions
diff --git a/compiler/src/dotty/tools/dotc/core/Types.scala b/compiler/src/dotty/tools/dotc/core/Types.scala index 639f5d142..271dcda7c 100644 --- a/compiler/src/dotty/tools/dotc/core/Types.scala +++ b/compiler/src/dotty/tools/dotc/core/Types.scala @@ -727,8 +727,8 @@ object Types { /** Is this type a legal type for a member that overrides another * member of type `that`? This is the same as `<:<`, except that - * the types ()T and => T are identified, and T is seen as overriding - * either type. + * the types `()T`, `=> T` and `T` are seen as overriding + * each other. */ final def overrides(that: Type)(implicit ctx: Context) = { def result(tp: Type): Type = tp match { @@ -737,7 +737,8 @@ object Types { } (this frozen_<:< that) || { val rthat = result(that) - (rthat ne that) && (result(this) frozen_<:< rthat) + val rthis = result(this) + (rthat.ne(that) || rthis.ne(this)) && (rthis frozen_<:< rthat) } } diff --git a/tests/pos/i2051.scala b/tests/pos/i2051.scala new file mode 100644 index 000000000..d0e9fed0d --- /dev/null +++ b/tests/pos/i2051.scala @@ -0,0 +1,2 @@ +class A[T](val x:T) +class B[T](override val x:T) extends A[T](x) |