SI-7231 Fix assertion when adapting Null type to Array type

GenICode was doing a sanity check when adapting an expression of type
Null to something else. It was just doing the wrong one. Instead of
checking whether the result expression type was a reference type it
was checking to see if it was an class reference type. This commit fixes
that and adds a test to make sure both forms of adaptation work as
expected.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/files/run/t7231.scala b/test/files/run/t7231.scala
new file mode 100644
index 0000000000..7d6bc81f3f
--- /dev/null
+++ b/test/files/run/t7231.scala
@@ -0,0 +1,11 @@
+object Test extends App {
+   val bar: Null = null
+
+   def foo(x: Array[Int]) = x
+   def baz(x: String) = x
+
+   // first line was failing
+   println(foo(bar))
+   // this line worked but good to have a double check
+   println(baz(bar))
+}
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