Compiler crash on inline method with array creation with implicitly summoned arg

[milessabin]

The following crashes the compiler during code generation,

import scala.compiletime._

object Test {
  implicit val i: Int = 23

  inline def foo() = {
    Array[Int](implicitly[Int])
  }

  foo()
}

Unexpected tree in genLoad: Inlined(Ident(DottyPredef$),List(),Apply(Ident(i),List()))/class dotty.tools.dotc.ast.Trees$Inlined at: <108..123>
java.lang.RuntimeException: Unexpected tree in genLoad: Inlined(Ident(DottyPredef$),List(),Apply(Ident(i),List()))/class dotty.tools.dotc.ast.Trees$Inlined at: <108..123>
        at dotty.tools.backend.jvm.DottyBackendInterface.abort(DottyBackendInterface.scala:390)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.genLoad(BCodeBodyBuilder.scala:431)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.genArray(BCodeBodyBuilder.scala:842)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.genArrayValue(BCodeBodyBuilder.scala:827)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.genLoad(BCodeBodyBuilder.scala:420)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.$anonfun$genLoadArguments$1(BCodeBodyBuilder.scala:1051)
        at dotty.tools.backend.jvm.BCodeBodyBuilder$PlainBodyBuilder.$anonfun$genLoadArguments$1$adapted(BCodeBodyBuilder.scala:1051)
        at scala.collection.immutable.List.foreach(List.scala:392)
...

The problem goes away if the implicitly summoned argument is assigned to a val first, or if the array creation is replaced by a call to a vanilla polymorphic method.

[odersky]

dropInlined fails to remove an inlined in the SeqLiteral. I tried to fix it but I could not understand the logic in dropInlined#transformed to do this with confidence. It would help if the transformed method was better documented. What does it do exactly? Why treat the cases it does and not others?