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Bug introduced in 13.0.0

If I type f[x_Inte and hit Tab to autocomplete, MMA correctly autocompletes this into f[x_Integer.

But if I type f[ρ_Inte and hit Tab, I get instead f[Integer, where ρ_ has magically vanished.

Is my install faulty? Or is this a known bug? Is there any fix?

I am using 13.0.0 for Microsoft Windows (64-bit) (December 3, 2021). Note that the behaviour is generic. You can replace Integer for any other predefined symbol, and ρ for any other variable other than pure letters (i.e., anything in brackets [...]), and the same issue happens.

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  • $\begingroup$ You should know that x is the unknown :-) $\endgroup$
    – chris
    Commented Jan 26, 2022 at 12:24
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    $\begingroup$ I have the same behavior in version 13.0.0 for Linux x86 (64-bit) (December 3, 2021) $\endgroup$
    – Hausdorff
    Commented Jan 26, 2022 at 12:28
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    $\begingroup$ I reproduce the issue with version 13.0.0 on Windows 10 x64. It is a bug, please report it to the support. $\endgroup$
    – Alexey Popkov
    Commented Jan 26, 2022 at 12:45
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    $\begingroup$ @AlexeyPopkov I just sent an email to [email protected]. Will update if/when they reply. $\endgroup$
    – AccidentalFourierTransform
    Commented Jan 26, 2022 at 12:53

1 Answer 1

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The bug has been confirmed by Wolfram support (2022-Jan-26):

Hello,

Thank you for taking the time to send your report.

It does appear that the front-end's AutoComplete feature is not behaving properly with non-alphanumeric characters. I have forwarded an issue report to our developers with the information you provided, and added your contact information to the report so that you can be notified when it is resolved.

We are always interested in improving Mathematica, and I want to thank you once again for bringing this issue to our attention. If you run into any other problems with any of our products or have any additional questions, please feel free to contact us.

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    $\begingroup$ Put > on the blank lines too $\endgroup$
    – b3m2a1
    Commented Jan 27, 2022 at 10:22

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