layout(set=0, binding=0) in threadgroup float x[];
layout(set=0, binding=1) out threadgroup float y[];

threadgroup texture2D tex;

threadgroup void a() {}

void b(threadgroup int b) {}

void c() {
    threadgroup bool x;
}

/*%%*
in / out variables may not be declared threadgroup
'threadgroup' is not permitted here
expected expression, but found 'threadgroup'
*%%*/