diff options
| -rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/PatMatVirtualiser.scala | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/PatMatVirtualiser.scala b/src/compiler/scala/tools/nsc/typechecker/PatMatVirtualiser.scala index 88cea2231f..838c7f8abd 100644 --- a/src/compiler/scala/tools/nsc/typechecker/PatMatVirtualiser.scala +++ b/src/compiler/scala/tools/nsc/typechecker/PatMatVirtualiser.scala @@ -1020,7 +1020,12 @@ class Foo(x: Other) { x._1 } // no error in this order override def traverse(t: Tree) { if (t != EmptyTree && t.pos == NoPosition) { - t.setPos(pos) + t setPos pos + // During a recursive descent traversal which prunes when it sees + // a position, one can't assign the position and THEN recurse. + // Ensuring that all children have compliant range positions. + for (t1 <- t ; if t1 ne t) + t1 setPos pos.makeTransparent } t match { case Function(_, _) if t.symbol == NoSymbol => |