[Webkit-unassigned] [Bug 167991] New: Inspector crashes if LANG env var specifies encoding

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167991

            Bug ID: 167991
           Summary: Inspector crashes if LANG env var specifies encoding
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mod-wkbz at mt2015.com
                CC: inspector-bugzilla-changes at group.apple.com

I'm using WebKit2GTK+ 2.14.3 on Arch Linux, but this bug has been around for some time.

The only locale-related {LC_*, LOCALE, LANG} environment variable set on my system is "LANG=es_ES.utf8". In this configuration, opening the WebKit2 inspector results in a "Web Inspector encountered an internal error." page instead of a working inspector.

If I set LANG to "es_ES" or "en_US" or "C", the inspector works. If I set LANG to the (invalid) "es_ES.", the C library complains about an invalid locale as it should:

(process:15144): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.

The browser then runs in English, but the inspector still crashes in the same way.

Given that no other software complains about "LANG=es_ES.utf8", the inspector should be fixed to also support such "locale.encoding" values.

The JS exception stack is attached below; it looks like IntlDateTimeFormat::initializeDateTimeFormat is really the problem here but I couldn't figure out how specifically.

-------
Inspected URL:        (unknown)
Loading completed:    false
Frontend User Agent:  Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/603.1 (KHTML, like Gecko) Version/10.0 Safari/603.1

Uncaught Exceptions:
 - TypeError: failed to initialize DateTimeFormat due to invalid locale (at LogTreeElement.js:32:107)
    DateTimeFormat @ [native code]
    toLocaleTimeString @ [native code]
    LogTreeElement @ LogTreeElement.js:32:107
    contentLoaded @ Main.js:247:63
    ? @ [native code]
 - TypeError: undefined is not an object (evaluating 'this.tabBrowser.updateLayout') (at Main.js:1512:20)
    _tabBrowserSizeDidChange @ Main.js:1512:20
    _windowResized @ Main.js:1401:34
    ? @ [native code]

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