Add test for obsolete issue

#KT-26345 Obsolete

compiler/testData/codegen/box/inference/kt26345.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+// FULL_JDK
+// WITH_RUNTIME
+// JVM_TARGET: 1.8
+
+import java.util.stream.Collectors
+import java.util.function.Function
+
+fun box(): String {
+    val m = listOf("OK", "OK")
+        .stream()
+        .collect(
+            Collectors.groupingBy(
+                Function.identity(),
+                Collectors.counting()
+            )
+        )
+    if (m["OK"] != 2L) return "fail: ${m["OK"]}"
+    return "OK"
+}