KT-629 Assignments are parsed as expressions

compiler/testData/checkerWithErrorTypes/quick/regressions/kt629.jet

@@ -0,0 +1,23 @@
+//KT-629 Assignments are parsed as expressions.
+
+namespace kt629
+
+class A() {
+    var p = "yeah"
+    fun mod(other : A) : A {
+        return A();
+    }
+}
+
+fun box() : Boolean {
+    var c = A()
+    val d = c;
+    c %= A();
+    return (c != d) && (<!ASSIGNMENT_IN_EXPRESSION_CONTEXT!>c.p = "yeah"<!>)
+}
+
+
+fun box2() : Boolean {
+    var <!UNUSED_VARIABLE!>c<!> = A()
+    return (<!ASSIGNMENT_IN_EXPRESSION_CONTEXT!>c.p = "yeah"<!>) && true
+}