SI-7473 Bad for expr crashes postfix

This commit makes building PostfixSelect robust against a bad pos
on its operand, which can happen if a bad for expression results
in an EmptyTree.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/neg/t7473.scala b/test/files/neg/t7473.scala
new file mode 100644
index 0000000000..593231d5f2
--- /dev/null
+++ b/test/files/neg/t7473.scala
@@ -0,0 +1,7 @@
+
+object Foo {
+  val i,j = 3
+  //for (x = Option(i); if x == j) yield 42  //t7473.scala:4: error: '<-' expected but '=' found.
+  // evil postfix!
+  (for (x = Option(i); if x == j) yield 42) toList
+}