KT-9601, KT-10103:

Chose maximally specific function in callable reference
 #KT-9601 Fixed
 #KT-10103 Fixed

compiler/testData/diagnostics/tests/callableReference/resolve/ambiguousWithVararg.kt

@@ -0,0 +1,16 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun fun1() {}
+fun fun1(x: Int) {}
+
+val ref1 = ::<!OVERLOAD_RESOLUTION_AMBIGUITY!>fun1<!>
+
+fun fun2(vararg x: Int) {}
+fun fun2(x: Int) {}
+
+val ref2 = ::<!OVERLOAD_RESOLUTION_AMBIGUITY!>fun2<!>
+
+fun fun3(x0: Int, vararg xs: Int) {}
+fun fun3(x0: String, vararg xs: String) {}
+
+val ref3 = ::<!OVERLOAD_RESOLUTION_AMBIGUITY!>fun3<!>