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union u { int i; char x[8]; }; static union u foo(int a) { return (union u)a; } static union u bar(long a) { return (union u)a; } /* * check-name: union-cast * check-command: sparse -Wunion-cast $file * * check-error-start eval/union-cast.c:8:17: warning: cast to union type eval/union-cast.c:13:17: warning: cast to non-scalar * check-error-end */