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Fix implicit scope liftToAnchors for parameter lower bounds #23679

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Fix implicit scope liftToAnchors for parameter lower bounds #23679

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2 changes: 1 addition & 1 deletion compiler/src/dotty/tools/dotc/typer/Implicits.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -832,7 +832,7 @@ trait ImplicitRunInfo:
WildcardType
else
seen += t
t.superType match
t.underlying match
case TypeBounds(lo, hi) =>
if lo.isBottomTypeAfterErasure then apply(hi)
else AndType.make(apply(lo), apply(hi))
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12 changes: 12 additions & 0 deletions tests/pos/i21951b.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@

class A
object A:
given A = ???

class B[X]
object B:
given g[T]: B[T] = ???

object Test:
def foo[X >: A] = summon[X] // was error
def bar[F[T] >: B[T]] = summon[F[Int]] // was error
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