result code = -1
standard error = {
tests/diagnostics/param-mutation.slang(17): warning 30068: mutating method 'setValue' called on `in` parameter 's'; changes will not be visible to caller. copy the parameter into a local variable if this behavior is intended
    s.setValue(v + 1);
              ^
tests/diagnostics/param-mutation.slang(36): error 30067: mutating method 'setValue' called on `in` parameter 's'; changes will not be visible to caller. copy the parameter into a local variable if this behavior is intended
    s.setValue(v + 1);
              ^
}
standard output = {
}