Bug 188946 – console.log() shows (anonymous function) instead of the passed string when a certain format is used

• Component: Web Inspector
• Status: RESOLVED FIXED

[Alicia Boya García]

Created attachment 348079 [details]
Screenshot of the problem in action

How to reproduce:

Run the following code:

console.log("video:1:2");
console.log("video/mp4:1:2");
console.log("video/mp4 : 00:04:42-00:04:44");

Expected output:

video:1:2
video/mp4:1:2
video/mp4 : 00:04:42-00:04:44

Actual output:

[f] video:1:2
[N] (anonymous function)
[N] (anonymous function)

What's going on?

The issue also reproduces when evaluating strings directly in the console, but not when they are enclosed in an array.

[Joseph Pecoraro]

This seems like a heuristic gone bad! I think this is the "attempt to detect a callstack" code. That should probably only work if it seems multiple potential frames, not one.

[Alicia Boya García]

(In reply to Joseph Pecoraro from comment #1)
> This seems like a heuristic gone bad! I think this is the "attempt to detect
> a callstack" code. That should probably only work if it seems multiple
> potential frames, not one.

Does it think it's a Error.stack and is trying to be helpful? How does that work, given that JSC `Error.stack` does not include line numbers nor a very distinct syntax?

[Radar WebKit Bug Importer]

<rdar://problem/43756428>

[Devin Rousso]

Created attachment 348271 [details]
Patch

[Devin Rousso]

Created attachment 348272 [details]
Patch

Just saw Joe's comment.  Added another condition relating to the number of lines/frames.

[EWS Watchlist]

Comment on attachment 348272 [details]
Patch

Attachment 348272 [details] did not pass mac-ews (mac):
Output: https://webkit-queues.webkit.org/results/9007856

New failing tests:
inspector/console/js-isLikelyStackTrace.html

[EWS Watchlist]

Created attachment 348278 [details]
Archive of layout-test-results from ews103 for mac-sierra

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews103  Port: mac-sierra  Platform: Mac OS X 10.12.6

[EWS Watchlist]

Comment on attachment 348272 [details]
Patch

Attachment 348272 [details] did not pass mac-debug-ews (mac):
Output: https://webkit-queues.webkit.org/results/9007990

New failing tests:
inspector/console/js-isLikelyStackTrace.html

[EWS Watchlist]

Created attachment 348282 [details]
Archive of layout-test-results from ews114 for mac-sierra

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews114  Port: mac-sierra  Platform: Mac OS X 10.12.6

[EWS Watchlist]

Comment on attachment 348272 [details]
Patch

Attachment 348272 [details] did not pass mac-wk2-ews (mac-wk2):
Output: https://webkit-queues.webkit.org/results/9008089

New failing tests:
inspector/console/js-isLikelyStackTrace.html

[EWS Watchlist]

Created attachment 348283 [details]
Archive of layout-test-results from ews106 for mac-sierra-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews106  Port: mac-sierra-wk2  Platform: Mac OS X 10.12.6

[Devin Rousso]

Created attachment 348303 [details]
Patch

[EWS Watchlist]

Comment on attachment 348303 [details]
Patch

Attachment 348303 [details] did not pass mac-wk2-ews (mac-wk2):
Output: https://webkit-queues.webkit.org/results/9012560

New failing tests:
css3/filters/backdrop/add-remove-add-backdrop-filter.html

[EWS Watchlist]

Created attachment 348316 [details]
Archive of layout-test-results from ews107 for mac-sierra-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews107  Port: mac-sierra-wk2  Platform: Mac OS X 10.12.6

[Blaze Burg]

Comment on attachment 348303 [details]
Patch

Code change seems fine, but you need to add new coverage to LayoutTests/inspector/console/js-isLikelyStackTrace.html

[Devin Rousso]

Created attachment 348356 [details]
Patch

[Blaze Burg]

Comment on attachment 348356 [details]
Patch

r=me (wait for EWS)

[WebKit Commit Bot]

Comment on attachment 348356 [details]
Patch

Clearing flags on attachment: 348356

Committed r235452: <https://trac.webkit.org/changeset/235452>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Joseph Pecoraro]

*** Bug 189750 has been marked as a duplicate of this bug. ***