error: 's2' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:18:5
   |
18 |     s2, rest := pair();                  // destructure name
   |     ^^^^^^^^^^^^^^^^^^^

error: 'u8' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:19:5
   |
19 |     if u8 := maybe() { }                 // if optional binding
   |     ^^^^^^^^^^^^^^^^^^^^

error: 's16' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:20:5
   |
20 |     while s16 := maybe() { break; }      // while optional binding
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: 'bool' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:22:5
   |
22 |     for xs: (bool) { }                   // for capture name
   |     ^^^^^^^^^^^^^^^^^^

error: 's32' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:23:5
   |
23 |     for xs: (v, s32) { }                 // for index name
   |     ^^^^^^^^^^^^^^^^^^^^

error: 'string' is a reserved type name and cannot be used as an identifier
  --> examples/1121-diagnostics-reserved-name-control-flow.sx:25:10
   |
25 |     r := if opt == {                     // match-arm capture
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
26 |         case .some: (string) { 0 }
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
27 |         case .none: { 0 }
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
28 |     };
   | ^^^^^