gcc/testsuite/gdc.test/fail_compilation/fail19103.d

/*
TEST_OUTPUT:
---
fail_compilation/fail19103.d(12): Error: no property `puts` for type `fail19103.C`
fail_compilation/fail19103.d(14): Error: no property `puts` for type `fail19103.S1`
fail_compilation/fail19103.d(16): Error: no property `puts` for type `S2`, did you mean `core.stdc.stdio.puts`?
---
*/

void main()
{
    (new C).puts("OK."); // Error: no property puts for type test.C, did you mean core.stdc.stdio.puts(T...)(T args)?
    S1 s1;
    s1.puts("Hey?"); // It can be compiled and runs!
    S2 s2;
    s2.puts("OK."); //  Error: no property puts for type S2, did you mean core.stdc.stdio.puts(T...)(T args)?
}

mixin template T()
{
    import core.stdc.stdio;
}

class C
{
    mixin T;
}
struct S1
{
    mixin T;
}

struct S2
{
    import core.stdc.stdio;
}