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util.inspect generates different output in Node minor update #8138

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maxrimue opened this issue Aug 17, 2016 · 7 comments
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util.inspect generates different output in Node minor update #8138

maxrimue opened this issue Aug 17, 2016 · 7 comments
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util Issues and PRs related to the built-in util module.

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@maxrimue
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  • Version: v6.4.0
  • Platform: Darwin 15.6.0 Darwin Kernel Version 15.6.0: Thu Jun 23 18:25:34 PDT 2016; root:xnu-3248.60.10~1/RELEASE_X86_64 x86_64
  • Subsystem: util/utilities

Since the update from Node.js v6.3 to Node.js v6.4, util.inspect generates a different output for the same object. This broke our tests and I'm not 100% sure if this is intended to happen.

Take this object:

{ desc: 'A command with no name',
  builder: [Function],
  handler: [Function] }

Then, running util.inspect on it:
Node v6.3:

'{ desc: \'A command with no name\',\n  builder: [ [Function: Function] ],\n  handler: [ [Function: Function] ] }'

Node v6.4:

'{ desc: \'A command with no name\',\r\n  builder: [ [Function: Function] ],\r\n  handler: [ [Function: Function] ] }'

Thanks

@yorkie
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yorkie commented Aug 17, 2016

See:

This is the correct behavior :-)

@maxrimue
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@yorkie Oh I see, thanks!

@addaleax
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The tests for [email protected] through [email protected] are failing with Node v6.4.0, and I think the citgm runs should have caught that… @thealphanerd any idea?

@MylesBorins
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@addaleax
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I’ll try to take a look at that

@bengl
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bengl commented Aug 17, 2016

Looks like yargs' tests fail on 6.4.0 when process.stdout.isTTY is true.

e.g.

$ npm t
// fail
$ npm t > result.out
$ cat result.out
// success

It makes sense, then, that this wasn't caught by citgm.

@addaleax
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@bengl Yup, I can confirm that… see yargs/yargs#597 for an attempt to fix this on yargs’ side

addaleax added a commit to addaleax/yargs that referenced this issue Aug 19, 2016
evanlucas added a commit to evanlucas/node that referenced this issue Aug 19, 2016
This reverts commit fce4b98.

This was a breaking change and should have been marked semver-major.
The change that was made altered the output of util.format() and
util.inspect(). With how much those are used in the wild, this type of
change deserves more justification.

Fixes: nodejs#8138
PR-URL: nodejs#8143
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
nexdrew pushed a commit to yargs/yargs that referenced this issue Aug 19, 2016
* test: fix process mocking in case of exception

Fix how the process/io mocking in `test/helpers/utils.js` handles
synchronous uncaught exceptions by adding a `finally` handler
resetting the mocked state.

* test: skip tests which require the window size when run without TTY

Skip two tests that would throw an exception when the test output
is redirected to a non-TTY (e.g. `npm test | cat`).

* test: show more debugging information when integration tests fail

* test: maybe fix tests on AppVeyor machines

* ci: temporarily set Node v6 version to v6.3.1

See nodejs/node#8138.
evanlucas added a commit that referenced this issue Aug 20, 2016
This reverts commit fce4b98.

This was a breaking change and should have been marked semver-major.
The change that was made altered the output of util.format() and
util.inspect(). With how much those are used in the wild, this type of
change deserves more justification.

Fixes: #8138
PR-URL: #8143
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
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