optimizationLevel 0 Error in file

[tcme]

Hi I am testing and comparing all plugins and I am wondering if this is the correct behavior.

From the readme

optimizationLevel
Type: number
Default: 3
Select an optimization level between 0 and 7.

with optimizationLevel: 0 I got the following error:

{ Error: Error in file: images/imagemin.png

** Processing: /var/folders/vc/g0g62cj15vg3vwyn3pdbp6bc0000gp/T/cce3c2b8-f207-44d9-8190-b364455560ed
Warning: Extraneous data found after IEND
400x400 pixels, 4x8 bits/pixel, RGB+alpha
Recoverable errors found in input. Fixing...
IDAT recoding is necessary, but is disabled by the user.
Error: Can't continue

** Status report
1 file(s) have been processed.
1 error(s) have been encountered.

    at ChildProcess.exithandler (child_process.js:202:12)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:850:16)
    at Socket.<anonymous> (internal/child_process.js:323:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:492:12)
  killed: false,
  code: 1,
  signal: null,
  cmd: '/Users/me/project/node_modules/optipng-bin/vendor/optipng -strip all -clobber -force -fix -o 0 -out /var/folders/vc/g0g62cj15vg3vwyn3pdbp6bc0000gp/T/401ab274-d280-49f7-b6f3-2f3bd0d558bb /var/folders/vc/g0g62cj15vg3vwyn3pdbp6bc0000gp/T/cce3c2b8-f207-44d9-8190-b364455560ed',
  stdout: '',
  stderr: '** Processing: /var/folders/vc/g0g62cj15vg3vwyn3pdbp6bc0000gp/T/cce3c2b8-f207-44d9-8190-b364455560ed\nWarning: Extraneous data found after IEND\n400x400 pixels, 4x8 bits/pixel, RGB+alpha\nRecoverable errors found in input. Fixing...\nIDAT recoding is necessary, but is disabled by the user.\nError: Can\'t continue\n\n** Status report\n1 file(s) have been processed.\n1 error(s) have been encountered.\n' }

test

const imagemin = require('imagemin');
const imageminOptipng = require('imagemin-optipng');

imagemin(['images/*.png'], 'build', {
  use: [imageminOptipng({
    optimizationLevel: 0
  })]
})
.then(() => {
  console.log('Images optimized');
})
.catch(err => {
  console.log(err)
});

[Kevin Mårtensson]

That's how optipng should work (according to the source code).

[tcme]

perfect and sorry for opening so many issues.

[Kevin Mårtensson]

No problem :).

[Alessandro Tagliapietra]

Maybe you should remove the option with 0? Or is it supposed to return an error?