Path must be a string. Received undefined

[krivochenko]

Hi everyone!
I try to concatenate two files by command:
mapcat dll/vendor_node.dll.js.map dist/server_tmp.js.map
and I get error:

TypeError: Path must be a string. Received undefined
    at assertPath (path.js:28:11)
    at Object.join (path.js:1253:7)
    at /var/www/sources/node_modules/mapcat/lib/index.js:27:22
    at Array.forEach (<anonymous>)
    at SourceMapConsumer_eachMapping [as eachMapping] (/var/www/sources/node_modules/mapcat/node_modules/source-map/lib/source-map/source-map-consumer.js:570:10)
    at exports.cat (/var/www/sources/node_modules/mapcat/lib/index.js:24:9)
    at Object.<anonymous> (/var/www/sources/node_modules/mapcat/bin/mapcat:34:1)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)

It caused by content of vendor_node.dll.js.map. I attached it to this issue. Thanks for help

[edc]

I pushed a potential fix. You can try the updated version (0.4.0) from npm. Let me know if it works.

[krivochenko]

Yes, it works. Thanks! But if I set breakpoints in home-view.component.ts which was compiled in dist/server_tmp.js it doesn't stop my code in defined place. If I add debugger; in my code, it stops but in mapcat-resulted server.js, but not in home-view.component.ts

[krivochenko]

Hm... even if I compile my application in one file by Webpack without using your plugin, it doesn't allow me see my not compiled code in debugger. Only resulted server.js

[krivochenko]

It was mistake in my settings. Thanks for fix!