tests/sksl/runtime_errors/LoopExpressionErrors.skvm

### Compilation failed:

error: 1099: missing loop expression
error: 1099: invalid operator in loop expression
error: 1099: loop index must be modified by a constant expression
error: 1099: invalid operator in loop expression
error: 1099: invalid operator in loop expression
error: 1099: loop index must be modified by a constant expression
error: 1099: loop index must be modified by a constant expression
7 errors