nodejs (windows) freeze of death, core dumped

[shimondoodkin]

windows 7

C:\Users\USER>node --version
v4.1.2

nodejs totally freezed not responding to end task also its parent cmd process did not respond.
there was no convert.exe running, node was using only one thread and 73mb memory and zero cpu..

i could still copy text but it did not responded to any attempt to interrupt.

the script was

converting images to webp using imagemagick executable(static 64bit version with config files copied from installed version)
after it converted 21,162 of about 30,000 files it freezed.

code dump: http://www.filedropper.com/node

var fs=require('fs')
var async = require('async')
var exec = require('child_process').exec;


function magicmime(file,cb)
{
    fs.open(file, 'r', function(status, fd) {
        if (status) {
            console.log(status.message);
            return;
        }
        var buffer = new Buffer(16);
        fs.read(fd, buffer, 0, 16, 0, function(err, num) {
            fs.close(fd, function(){
                var str=buffer.toString('binary', 0, num);
                if(str.substr(1,3)=='PNG') return cb('.png');
                if(str.substr(0,2)=='BM') return cb('.bmp');
                if(str.substr(0,6)=='GIF89a') return cb('.gif');
                if(str.substr(6,4)=='JFIF'||str.substr(6,4)=='Exif') return cb('.jpg');
                if(str.substr(10,4)=='HTML') return cb(''); //cb('.html');
                if(str=="") return cb(''); // empty file
                var hex=buffer.toString('hex');
                if(hex.substr(0,6)=='ffd8ff') return cb('.jpg'); // low end digital camera
                if(hex.substr(0,10)=='0000000000') return cb(''); // empty file
                if(hex.substr(0,6)=='1f8b08') return cb('.gz'); // empty file
                console.log('different file',file,buffer.toString('hex'));
                return cb('');
            });
        });
    });
}

function trimimg()
{
    var i=0;
    var files=fs.readdirSync('img');
    async.eachLimit(files,8,function(a,cb)
    {
     if(!a.match(/\.(png|jpg|bmp|gif)$/i)){i++;return cb()};

     if(fs.existsSync("imgtrim/"+a.replace(/\..+?$/i,"")+".webp")) {i++;return cb()};

     var name=a,
         oname=a.replace(/\..+?$/i,"")+".webp";

     magicmime('img/'+name,function(a){

         if(a=='.png'||a=='.bmp'||a=='.gif'||a=='.jpg')
         {
             var cmd='C:/mingw/msys/1.0/home/USER/stores/bin/imm/convert img/'+name
                     +' -bordercolor white -border 1x1'
                     +' -fill none -fuzz 2.5% -draw "color 0,0 floodfill"'
                     +' -trim +repage'
                     +' imgtrim/'+oname;

             console.log(i++,files.length,name);
             run(cmd,cb);
         }
         else
         {
            cb();
         }

     });

    },function(){console.log('done')});
}
trimimg()

(i don't need solutions it was one time run script, just a bug report)

[seishun]

A bug report normally includes a minimal test case. Would you be willing to attempt to produce one?

[shimondoodkin]

i'll try

[bnoordhuis]

Closing, no follow-up.