void a() { x = float2(1); }
void b() { float w = x; }
void c() { float w = x, y; }
void d() { float w = x, y = z; }

float e = f, g = h;
float i = j, k;

/*%%*
unknown identifier 'x'
unknown identifier 'x'
unknown identifier 'x'
unknown identifier 'x'
unknown identifier 'z'
unknown identifier 'f'
unknown identifier 'h'
unknown identifier 'j'
*%%*/