bug in debug mode!!!!!!

my test code:

const vo = require('vo');
function * go() {
    try {
        console.log(1);
        throw new Error('rrrr');
        return true;
    } catch (error) {
        throw error;
    } finally {
        console.log('finally')
    }
}

vo(go)
    .then(r => {
        console.log('then: ', r);
    }).catch(e => {
    console.error("catch:", e);
});

no debug mode:

node test
1
finally
catch: Error: rrrr
    at go (c:\node.data\posters\poster\test.js:5:15)
    at go.next (<anonymous>)
    at next (c:\node.data\posters\poster\node_modules\co\index.js:74:21)
    at c:\node.data\posters\poster\node_modules\co\index.js:45:5
    at wrap (c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:30:21)
    at func (c:\node.data\posters\poster\node_modules\vo\lib\compile.js:44:23)
    at next (c:\node.data\posters\poster\node_modules\vo\lib\pipeline.js:34:15)
    at Pipeline (c:\node.data\posters\poster\node_modules\vo\lib\pipeline.js:47:8)
    at c:\node.data\posters\poster\node_modules\vo\index.js:44:5
    at c:\node.data\posters\poster\node_modules\vo\index.js:101:9

in debug mode:

>set DEBUG=*,-not_this

>node test.js
  vo ↗ go() +0ms
1
finaly
c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:120
    if (str.length > limit) {
           ^

TypeError: Cannot read property 'length' of undefined
    at trim (c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:120:12)
    at c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:109:14
    at Array.map (native)
    at pretty (c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:108:30)
    at next (c:\node.data\posters\poster\node_modules\vo\lib\wrap.js:36:30)
    at Immediate.<anonymous> (c:\node.data\posters\poster\node_modules\co\index.js:52:14)
    at runCallback (timers.js:651:20)
    at tryOnImmediate (timers.js:624:5)
    at processImmediate [as _immediateCallback] (timers.js:596:5)

Reproduce the example with DEBUG=*,-not_this using test.js, then inspect node_modules/vo/lib/wrap.js around trim (line 120), pretty (line 108), and next (line 36). Done means debug mode no longer crashes with the reported undefined-length TypeError while handling the example's error path.