diff options
Diffstat (limited to 'src/dotty/tools/dotc/typer/ErrorReporting.scala')
| -rw-r--r-- | src/dotty/tools/dotc/typer/ErrorReporting.scala | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/dotty/tools/dotc/typer/ErrorReporting.scala b/src/dotty/tools/dotc/typer/ErrorReporting.scala index 8f9b01fe6..0b016769b 100644 --- a/src/dotty/tools/dotc/typer/ErrorReporting.scala +++ b/src/dotty/tools/dotc/typer/ErrorReporting.scala @@ -28,7 +28,11 @@ object ErrorReporting { def errorMsg(msg: String, cx: Context): String = if (cx.mode is Mode.InferringReturnType) { cx.tree match { - case tree: Trees.ValOrDefDef[_] => + case tree: untpd.ValOrDefDef => + // Dotty deviation: Was Trees.ValOrDefDef[_], but this gives ValOrDefDef[Nothing] instead of + // ValOrDefDel[Null]. Scala handles it, but it looks accidental because bounds propagation + // fails if the parameter is invariant or cotravariant. + // See test pending/pos/boundspropagation.scala val treeSym = ctx.symOfContextTree(tree) if (treeSym.exists && treeSym.name == cycleSym.name && treeSym.owner == cycleSym.owner) { val result = if (cycleSym.isSourceMethod) " result" else "" |