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This code crashes in NodeJS:

var rapidMix = require('rapidlib');
var testDTW = new rapidMix.SeriesClassification();

testSet2 = [];
for (let i = 0; i < 5; ++i) {
    testSet2.push([0.1, 0.1, 0.1]);
}

let series2 = {input: testSet2, label: "yyy"};
let series1 = {input: testSet2, label: "zzz"};
let sset = [series1, series2];

console.log(testDTW.train(sset));
console.log(testDTW.run(testSet2));

It doesn't crash in the browser here:
https://live.codecircle.com/d/oma4nGEEk8SXvZ6hg

It doesn't crash in C++.

It doesn't crash if the feature vector has 2 or 4 members. It also doesn't crash for many power of two, or similar, set lengths.

It calls _abort from the emscripten _free() method.