Test tasty backwards compatibility

This currently fail with:

MethodType(List(y), List(TypeRef(TermRef(TermRef(ThisType(TypeRef(NoPrefix,module class <root>)),object scala),Predef),String)), TypeRef(ThisType(TypeRef(NoPrefix,module class <empty>)),class Bar)) (of class dotty.tools.dotc.core.Types$CachedMethodType)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readLengthTerm$1(TreeUnpickler.scala:1154)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTerm(TreeUnpickler.scala:1313)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readLengthTerm$1(TreeUnpickler.scala:1137)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTerm(TreeUnpickler.scala:1313)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.$anonfun$24(TreeUnpickler.scala:1138)
        at dotty.tools.tasty.TastyReader.until(TastyReader.scala:125)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readLengthTerm$1(TreeUnpickler.scala:1138)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTerm(TreeUnpickler.scala:1313)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedStat(TreeUnpickler.scala:998)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedStats$$anonfun$1(TreeUnpickler.scala:1036)
        at dotty.tools.tasty.TastyReader.until(TastyReader.scala:125)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedStats(TreeUnpickler.scala:1036)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readStats(TreeUnpickler.scala:1040)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readLengthTerm$1(TreeUnpickler.scala:1166)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTerm(TreeUnpickler.scala:1313)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readLengthTerm$1(TreeUnpickler.scala:1158)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTerm(TreeUnpickler.scala:1313)
        at dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.createMemberSymbol$$anonfun$1(TreeUnpickler.scala:614)
        at dotty.tools.dotc.core.Annotations$.dotty$tools$dotc$core$Annotations$$anon$2$$_$$lessinit$greater$$anonfun$1(Annotations.scala:162)
        at dotty.tools.dotc.core.Annotations$LazyBodyAnnotation.tree(Annotations.scala:150)
        at dotty.tools.dotc.typer.Inliner$.bodyToInline(Inliner.scala:53)
        at dotty.tools.dotc.typer.Inliner$.inlineCall(Inliner.scala:157)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:70)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform$$anonfun$1(Trees.scala:1494)
        at scala.collection.immutable.List.mapConserve(List.scala:472)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform(Trees.scala:1494)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform(Trees.scala:1388)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:73)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:78)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformBlock$$anonfun$1$$anonfun$1(tpd.scala:1211)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.loop$2(tpd.scala:1193)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformStats(tpd.scala:1206)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformBlock(tpd.scala:1211)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform(Trees.scala:1402)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:49)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:66)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:56)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:64)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.loop$2(tpd.scala:1206)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformStats(tpd.scala:1206)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformStats(tpd.scala:1208)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:64)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:64)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform(Trees.scala:1465)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:73)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:64)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.loop$2(tpd.scala:1206)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformStats(tpd.scala:1206)
        at dotty.tools.dotc.ast.tpd$TreeMapWithPreciseStatContexts.transformStats(tpd.scala:1208)
        at dotty.tools.dotc.ast.Trees$Instance$TreeMap.transform(Trees.scala:1476)
        at dotty.tools.dotc.ast.TreeMapWithImplicits.transform(TreeMapWithImplicits.scala:73)
        at dotty.tools.dotc.transform.Inlining$InliningTreeMap.transform(Inlining.scala:78)
        at dotty.tools.dotc.transform.Inlining$$anon$2.transform(Inlining.scala:56)
        at dotty.tools.dotc.transform.MacroTransform.run(MacroTransform.scala:18)
        at dotty.tools.dotc.transform.Inlining.run(Inlining.scala:28)

Author: smarter

tests/run/backwardsCompat-implicitParens/A_1_c3.0.2.scala

@@ -0,0 +1,6 @@
+class Bar(using x: Int)(y: String)
+object Bar:
+  given Int = 1
+  inline def foo =
+    println(new Bar()(""))
+    println(Bar()(""))

tests/run/backwardsCompat-implicitParens/Test_2.scala

@@ -0,0 +1,5 @@
+@main def Test =
+  given Int = 1
+  println(new Bar(""))
+  println(Bar(""))
+  println(Bar.foo)