### Compilation failed:

error: 3: atomics are only permitted in workgroup variables and writable storage blocks
    switch (x) { case 0: atomicUint[7] a, b = a; }
                         ^^^^^^^^^^^^^^^
error: 3: atomics are only permitted in workgroup variables and writable storage blocks
    switch (x) { case 0: atomicUint[7] a, b = a; }
                                          ^^^^^
error: 3: opaque type 'atomicUint[7]' cannot use initializer expressions
    switch (x) { case 0: atomicUint[7] a, b = a; }
                                              ^
3 errors