in sampler a[1];
in sampler[1] b;
void fnC() { sampler c[1]; }
void fnD() { sampler[1] d; }

/*%%*
opaque type 'sampler' may not be used in an array
opaque type 'sampler' may not be used in an array
opaque type 'sampler' may not be used in an array
opaque type 'sampler' may not be used in an array
*%%*/