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// { dg-do assemble } // GROUPS passed MI struct S1 { }; struct S2 : S1 { }; struct S3 : S1 { }; struct S4 : S3, S2 { }; struct S1 *p1; struct S4 *p4; void foobar () { p1 = p4; // { dg-error "" } this is illegal// ERROR - .* }