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module: always decorate thrown errors #4287

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mscdex wants to merge 1 commit into from
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module: always decorate thrown errors #4287

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@mscdex mscdex commented Dec 15, 2015

This provides more information when encountering a syntax or similar error when executing a file with require().

@mscdex mscdex added the module Issues and PRs related to the module subsystem. label Dec 15, 2015
@mscdex mscdex mentioned this pull request Dec 15, 2015
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mscdex commented Dec 15, 2015

CI is all green except flaky tests and CI issues: https://ci.nodejs.org/job/node-test-pull-request/1001/

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bnoordhuis commented Dec 15, 2015

LGTM

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cjihrig commented Dec 15, 2015

Using the normal workflow, this will cause two arrow messages to be printed. For example:

$ node foo.js 
/Users/cjihrig/iojs/node/foo.js:1
 ^
 ^

/Users/cjihrig/iojs/node/foo.js:1
 ^
 ^
SyntaxError: Unexpected token ^
...

Where foo.js just contains a ^.

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cjihrig commented Dec 15, 2015

From a quick test, it looks like removing the arrow information from ReportException() in node.cc fixes the problem.

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mscdex commented Dec 15, 2015

Hrmm... what about adding/checking a "decorated" flag as another hidden value on the error object?

@mscdex mscdex force-pushed the module-decorate-errors branch 2 times, most recently from 57a9169 to 490c4b8 Compare December 15, 2015 20:39
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mscdex commented Dec 15, 2015

@cjihrig Alright, I added a 'decorated' flag and a new test for uncaught errors.

CI is all green except flaky tests/CI issues: https://ci.nodejs.org/job/node-test-pull-request/1006/

@mscdex mscdex force-pushed the module-decorate-errors branch from 490c4b8 to fbcb95a Compare December 15, 2015 21:10
cjihrig
cjihrig reviewed Dec 16, 2015
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test/parallel/test-util-decorate-error-stack.js Outdated
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Should this use result?

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@mscdex mscdex Dec 16, 2015

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Fixed.

@mscdex mscdex force-pushed the module-decorate-errors branch 3 times, most recently from 9dc88d1 to ed203d0 Compare December 16, 2015 03:56
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mscdex commented Dec 16, 2015

Incorporated suggestions and CI is green except flaky tests: https://ci.nodejs.org/job/node-test-pull-request/1010/

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cjihrig commented Dec 16, 2015

LGTM

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I'd probably give this a slightly more unique name, e.g. 'node:decorated'. (Ditto for 'arrowMessage' although this PR didn't introduce that.)

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jasnell commented Dec 16, 2015

semver-minor?

@mscdex mscdex force-pushed the module-decorate-errors branch from ed203d0 to ac1633b Compare December 17, 2015 22:49
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mscdex commented Dec 17, 2015

@bnoordhuis I've made your suggested changes. LGTY now?

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Superfluous parentheses and you can shorten it to return !decorated.IsEmpty() && decorated->IsTrue(), which should also be infinitesimally faster.

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bnoordhuis commented Dec 17, 2015

LGTM with a nit and a suggestion.

@mscdex
module: always decorate thrown errors
e7ac2fc 
This provides more information when encountering a syntax or similar
error when executing a file with require().
@mscdex mscdex force-pushed the module-decorate-errors branch from ac1633b to e7ac2fc Compare December 17, 2015 23:54
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mscdex commented Dec 18, 2015

Updated commit. Last CI run: https://ci.nodejs.org/job/node-test-pull-request/1022/

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mscdex commented Dec 18, 2015

@jasnell I'm not sure how this fits in (if at all) with whatever was agreed upon on with regard to changing errors and semver-ness, but my guess would be semver-major since it's changing the formatting of the stack trace?

mscdex added a commit that referenced this pull request Dec 19, 2015
@mscdex
module: always decorate thrown errors
18490d3 
This provides more information when encountering a syntax or similar
error when executing a file with require().

Fixes: #4286
PR-URL: #4287
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
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mscdex commented Dec 19, 2015

Landed in 18490d3.

@mscdex mscdex closed this Dec 19, 2015
@mscdex mscdex deleted the module-decorate-errors branch December 19, 2015 19:20
Fishrock123 pushed a commit to Fishrock123/node that referenced this pull request Dec 22, 2015
@mscdex @Fishrock123
module: always decorate thrown errors
72b6b4f 
This provides more information when encountering a syntax or similar
error when executing a file with require().

Fixes: nodejs#4286
PR-URL: nodejs#4287
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Fishrock123 added a commit to Fishrock123/node that referenced this pull request Dec 22, 2015
@Fishrock123
2015-12-22, Version 5.3.1 (Stable)
b7fd395 
Notable changes:

* general: Several minor performance improvements:
  - lib: Use arrow functions instead of bind where possible (Minwoo
Jung) nodejs#3622
  - node: Improved accessor perf of process.env (Trevor Norris)
nodejs#3780
  - **node**: Improved performance of hrtime() (Trevor Norris)
nodejs#3780
  - node: Improved GetActiveHandles performance (Trevor Norris)
nodejs#3780
* module: Errors during require() now provide more information (Brian
White) nodejs#4287
@jasnell jasnell added the semver-major PRs that contain breaking changes and should be released in the next major version. label Dec 24, 2015
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jasnell commented Dec 24, 2015

Marking as semver-major due to the error handling change. It's not clear if this is major or minor tho. @nodejs/ctc

@jasnell jasnell mentioned this pull request Mar 17, 2016
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scovetta pushed a commit to scovetta/node that referenced this pull request Apr 2, 2016
@mscdex
module: always decorate thrown errors
65c424f 
This provides more information when encountering a syntax or similar
error when executing a file with require().

Fixes: nodejs#4286
PR-URL: nodejs#4287
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
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