EA-40964

Don't access elements of an empty array

compiler/testData/diagnostics/tests/regressions/ea40964.kt

@@ -0,0 +1,8 @@
+package checkFiles
+
+import java.util.HashMap
+
+fun main(args: Array<String>) {
+    val hashMap = HashMap<String, String>()
+    hashMap[<!SYNTAX!><!>]
+}