Strange behavior during error recovery

[Philip Taylor]

Philip Taylor wrote:

> All fine here under Windows 7 Enterprise (64-bit) — the initial "E" 
> does not mutate into an "H", and all proceeds normally.

It would seem that the behaviour is different if the offending input is 
entered other than on the command line :

> C:\Users\Philip Taylor_2>tex \relax
> This is TeX, Version 3.14159265 (TeX Live 2020/W32TeX) (preloaded 
> format=tex)
>
> *\s^^?E
> ! Undefined control sequence.
> <*> \s
>       ^^?E
> ? 1
> ! Text line contains an invalid character.
> <*> \s^^?
>          E
> ? q
> OK, entering \batchmode

Additional <return> required to end process, but initial "E" still does 
not mutate into an "H".

>
>
> C:\Users\Philip Taylor_2>tex \relax
> This is TeX, Version 3.14159265 (TeX Live 2020/W32TeX) (preloaded 
> format=tex)
>
> *\s^^?E
> ! Undefined control sequence.
> <*> \s
>       ^^?E
> ? 1
> ! Text line contains an invalid character.
> <*> \s^^?
>          E
> ? r
> OK, entering \nonstopmode...
> <*> \s^^?E
>
> ?

Different behaviour following 'r' to that reported by Enrico.

/Philip Taylor/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://tug.org/pipermail/texhax/attachments/20200628/da8303b6/attachment-0001.html>