getRaw returns extra characters if unicode

[ainthek]

when grasp is using flow parser , the AST returns ranges and getRaw returns incorrect match.
See test case. This is eather bug in flow-parser or bad interpretation of range in grasp implementation of getRaw. Any hints ? Thanx

const grasp = require("grasp");
var raw;
var replacer = grasp.replace('equery', 'var INPUT=$x;', function(getRaw, node, query, named) {
raw = getRaw(node);
return "";
});
replacer("var INPUT={test:'aa'};var UNEXPECTED;");
console.assert(raw==="var INPUT={test:'aa'};");

replacer("var INPUT={test:'až'};var UNEXPECTED;");
console.log(raw); //contains extra char, range from AST is wrong
console.assert(raw==="var INPUT={test:'až'};"); //FAILS

[ainthek]

Just a note: On the other hand, it seems that -o option works , because formatResult function does not work with node.range but works with node.loc.

Please can you explain also parser options range:true and false ? I tried to switch it to false for flow-parser but it seems to have no effect and node.rage is still calculated (and incorrectly) interpreted in replaceFunction (getRaw)

parser: ['flow-parser',
{ loc: true, sourceType: 'module', range: "false" }
],