Unsupported locales

[0x54321]

Hi, thanks for the great package. 🙂

I've noticed a couple of errors in my site's error log due to getUserLocale strings that are incompatible with the Intl.NumberFormat constructor. The ones that I've seen so far are:

• C
• posix
• en-US,en

I'm not quite sure what systems are generating those locales, but they really should be filtered out, since they apparently aren't compatible with the Intl standard.

Cheers

[wojtekmaj]

Hi @0x54321, that's interesting! Do you have any more information, e.g. browser/OS on which these errors happened? That would be hugely helpful.

[0x54321]

Some recent examples - "en-US,en" was generated by Mac OS X 10.15.3 / Safari 13.0.5 and Windows 10 / Firefox 81.0 "en-US@posix" was generated by Linux / Chrome 80.0.3987

I can't find the info for "C", but I think it was also Linux-related.

[osdiab]

I found one as well - Huawei's PetalBot search crawler apparently returns en-US.UTF-8 which blows up when you try to pass that to an Intl method.

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