error: only a string LITERAL coerces to 'cstring' implicitly; an arbitrary string may be an unterminated view — materialize it with to_cstring(s)
  --> examples/1173-diagnostics-cstring-coercions.sx:9:5
   |
 9 |     c : cstring = s;            // error: non-literal string -> cstring
   |     ^^^^^^^^^^^^^^^^

error: 'cstring' does not coerce to 'string' implicitly (the length is implicit); convert with from_cstring(c)
  --> examples/1173-diagnostics-cstring-coercions.sx:10:5
   |
10 |     t : string = c;             // error: cstring -> string
   |     ^^^^^^^^^^^^^^^