Can't get node-source-map-support to work on node

[0xR]

Me (and a colleague) have tried the basic demo from the readme in both node 0.12.7 and 0.10.38, but it doesn't show me the mapped stacktrace. The same occured when I integrated node-source-map-support in my project.

My stacktrace looks like this:

/tmp/smtest/compiled.js:3
throw new Error('test'); // This is the compiled code
      ^
Error: test
    at Object.<anonymous> (/tmp/smtest/compiled.js:3:7)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3

Is this project broken or am I doing something wrong?

[julien-f]

This project is not broken, I use it regularly!

But indeed, the demo is not working as it should…

[0xR]

Ok if the example is wrong I have created a new example that does work:

original.js:

require('source-map-support').install();

throw new Error('test'); // This is the original code

compiled.js:

throw require("source-map-support").install(),new Error("test");
//# sourceMappingURL=compiles.js.map

compiled.js.map:

{"version":3,"sources":["original.js"],"names":["require","install","Error"],"mappings":"AAEA,KAFAA,SAAQ,sBAAsBC,UAExB,GAAIC,OAAM"}

[0xR]

Maybe put this in a example dir in the repo? to make it easier for people?

[CrabDude]

Ditto. It looks like the culprit for me is the "transform-strict-mode" plugin:

$ cat foo.js 
require('source-map-support').install();

throw new Error('test'); // This is the original code
$ babel-node foo.js 
Error: test
    at Object.<anonymous> (/private/tmp/foo/foo.js:5:7)
    at Module._compile (module.js:399:26)
    at loader (/Users/crabdude/.npmprefix/lib/node_modules/babel-cli/node_modules/babel-register/lib/node.js:130:5)
    at Object.require.extensions.(anonymous function) [as .js] (/Users/crabdude/.npmprefix/lib/node_modules/babel-cli/node_modules/babel-register/lib/node.js:140:7)
    at Module.load (module.js:345:32)
    at Function.Module._load (module.js:302:12)
    at Function.Module.runMain (module.js:431:10)
    at /Users/crabdude/.npmprefix/lib/node_modules/babel-cli/lib/_babel-node.js:161:27
    at Object.<anonymous> (/Users/crabdude/.npmprefix/lib/node_modules/babel-cli/lib/_babel-node.js:162:7)
    at Module._compile (module.js:399:26)
$ babel-node -V
6.3.17
$ npm ls source-map-support
foo@1.0.0 /private/tmp/foo
└── source-map-support@0.4.0  extraneous

$ node -v
v5.2.0
$ cat .babelrc 
{
  "plugins": ["transform-strict-mode"]
}

It would be nice to know if this is a bug with babel-plugin-transform-strict-mode or node-source-map-support.

Phabricator issue

[seanpoulter]

Re: @CrabDude's "transform-strict-mode" plugin issue:

This isn't a problem for me from babel-node 6.24.0 and node 6.10.

$ npm i babel-cli babel-plugin-transform-strict-mode source-map-support

$ cat foo.js
require('source-map-support').install();
throw new Error('test'); // This is the original code

$ cat .babelrc
{
  "plugins": ["transform-strict-mode"]
}

$ babel-node foo.js
throw new Error('test'); // This is the original code
      ^
Error: test
    at Object.<anonymous> (F:/tmp/@CrabDude/foo.js:2:7)
    at Module._compile (module.js:570:32)
    at loader (F:\tmp\@CrabDude\node_modules\babel-register\lib\node.js:144:5)
    at Object.require.extensions.(anonymous function) [as .js] (F:\tmp\@CrabDude\node_modules\babel-register\lib\node.js:154:7)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Function.Module.runMain (module.js:604:10)
    at Object.<anonymous> (F:\tmp\@CrabDude\node_modules\babel-cli\lib\_babel-node.js:154:22)
    at Module._compile (module.js:570:32)

$ babel foo.js --out-file compiled-foo.js --source-maps

$ node compiled-foo.js
throw new Error('test'); // This is the original code
      ^
Error: test
    at Object.<anonymous> (F:\tmp\@CrabDude\foo.js:2:7)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:509:3

[LinusU]

This is fixed now 👏