Don't chain implicit conversions

When inferring a view, we are not allowed to use another
implicit conversion to adapt its result. Fixing this revealed
another problem where we have to re-enable implicit conversions
when pre-typing arguments in overloading resolution.

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/neg/i2030.scala b/tests/neg/i2030.scala
new file mode 100644
index 000000000..2d049f4e6
--- /dev/null
+++ b/tests/neg/i2030.scala
@@ -0,0 +1,5 @@
+// This used to take ~12s, the check should be that
+// it runs in reasonable time (i.e. instantaneous).
+object a {
+   val x: String | Int = 'a // error
+}