javascript - How to make Mocha display correct line numbers in source files if a test fails? -

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i'm using mocha nodejs tests, , when test fails due error thrown source code (for example "typeerror: cannot read property 'prop' of null"), line numbers in displayed stacktrace wrong (they don't match original source file, far bigger).

  1) myapp should something:      typeerror: cannot read property 'prop' of null       @ myapp.<anonymous> (/path/to/my-project/lib/my-project.js:515:93)       @ myapp.build (/path/to/my-project/lib/my-project.js:774:16)       @ context.<anonymous> (/path/to/my-project/test/test.js:62:67)       @ test.runnable.run (/path/to/my-project/node_modules/mocha/lib/runnable.js:216:15)       @ runner.runtest (/path/to/my-project/node_modules/mocha/lib/runner.js:373:10)       @ /path/to/my-project/node_modules/mocha/lib/runner.js:451:12       @ next (/path/to/my-project/node_modules/mocha/lib/runner.js:298:14)       @ /path/to/my-project/node_modules/mocha/lib/runner.js:308:7       @ next (/path/to/my-project/node_modules/mocha/lib/runner.js:246:23)       @ object._onimmediate (/path/to/my-project/node_modules/mocha/lib/runner.js:275:5)       @ processimmediate [as _immediatecallback] (timers.js:330:15)

(here my-project.js has 279 lines !)

is there way tell mocha display them correctly?

this happens when code instrumented coverage tool (e.g. blanket, istanbul, etc). double-check make sure aren't loading in normal tests mistake.


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