Add regression tests

compiler/test/dotc/pos-decompilation.blacklist

@@ -1,45 +1,3 @@
-# assertion failed: asTerm called on not-a-Term val <none>
-cls.scala
-escapes2.scala
-existentials-harmful.scala
-constrs.scala
-i2051.scala
-i2663.scala
-i1318.scala
-gui.scala
-i1756.scala
-i2218.scala
-objXfun.scala
-printTest.scala
-paramAliases.scala
-michel1.scala
-nested.scala
-philippe3.scala
-t115.scala
-t0017.scala
-t0055.scala
-t1075.scala
-t267.scala
-t247.scala
-t1226.scala
-t0039.scala
-t8324.scala
-t4062.scala
-t8177b.scala
-t803.scala
-t3071.scala
-t8177.scala
-tangledCompanion.scala
-templateParents.scala
-t5384.scala
-t9795.scala
-alias.scala
-t0032.scala
-supercalls.scala
-i1776.scala
-i3638.scala
-i618.scala
-
 # Stackoverflow
 avoid.scala
 i1047.scala
@@ -49,16 +7,8 @@ i1181.scala
 large.scala
 large2.scala
 
-# scala.MatchError: EmptyTree
+# scala.MatchError: TermParamRef(x)
 depfuntype.scala
-compound.scala
-implicit-dep.scala
-refinedSubtyping.scala
-zoo2.scala
-typers.scala
-apply-equiv.scala
-projections.scala
-lookuprefined.scala
 
 # NPE
 i2888.scala

compiler/test/dotc/run-decompilation.blacklist

@@ -1,37 +1,3 @@
-# asTerm called on not-a-Term val <none>
-t5045.scala
-mixins.scala
-t6666a.scala
-t4777.scala
-t6957.scala
-t8177f.scala
-Course-2002-06.scala
-implicits_poly.scala
-tcpoly_parseridioms.scala
-t4062.scala
-paramForwarding.scala
-t6506.scala
-i1692.scala
-caseclasses.scala
-i2883.scala
-t6793.scala
-i2163.scala
-planets.scala
-view-iterator-stream.scala
-enums.scala
-NestedClasses.scala
-paramForwarding_together.scala
-paramForwarding_together_b.scala
-t629.scala
-i763.scala
-t0883.scala
-absoverride.scala
-t3048.scala
-t3619.scala
-t3651.scala
-protectedacc.scala
-t7436.scala
-
 # scala.MatchError: SeqLiteral in pattern
 i3248.scala
 t6541.scala