bug#51877: 27.2; term: error in process filter

[Christopher Howard]

The package emacs-next-28.0.50-0.2ea3466 is available in my current checkout of 
Guix. I seem to get the same results:

```
Debugger entered--Lisp error: (args-out-of-range "$ \2\220\22\33nN\4\216" 0 -42)
  term-emulate-terminal(#<process terminal> 
"l\0l\234\236|\0\214l\340|\2\f\f\f\204\4l\354\4#|\216\203\3\344\22\262\337|\33b\204\fb\214\362oo\337lNo\234\343\344\f#\34p...")
```

Is that new enough?