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Diffstat (limited to 'src/dotty/tools/dotc/transform/PatternMatcher.scala')
| -rw-r--r-- | src/dotty/tools/dotc/transform/PatternMatcher.scala | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/dotty/tools/dotc/transform/PatternMatcher.scala b/src/dotty/tools/dotc/transform/PatternMatcher.scala index d665aa0c5..507dbb0ce 100644 --- a/src/dotty/tools/dotc/transform/PatternMatcher.scala +++ b/src/dotty/tools/dotc/transform/PatternMatcher.scala @@ -21,6 +21,7 @@ import ast.Trees._ import Applications._ import TypeApplications._ import SymUtils._, core.NameOps._ +import typer.Mode import dotty.tools.dotc.util.Positions.Position import dotty.tools.dotc.core.Decorators._ @@ -464,8 +465,9 @@ class PatternMatcher extends MiniPhaseTransform with DenotTransformer {thisTrans // all potentially stored subpat binders val potentiallyStoredBinders = stored.unzip._1.toSet // compute intersection of all symbols in the tree `in` and all potentially stored subpat binders - new DeepFolder[Unit]((x: Unit, t:Tree) => + def computeBinders(implicit ctx: Context) = new DeepFolder[Unit]((x: Unit, t:Tree) => if (potentiallyStoredBinders(t.symbol)) usedBinders += t.symbol).apply((), in) + computeBinders(ctx.addMode(Mode.FutureDefsOK)) // trigged a NotDefinedHere on $outer when compiler dotc/printing if (usedBinders.isEmpty) in else { |