Re: ["regression"] Stéphane= 1 zsh -c 'echo $Stéphane'

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

This is discussed in the thread starting at workers/34004 and leading
up to workers/34015.

Nobody ever commented on whether the environment is allowed to contain
names with the high-order bit set, but POSIX identifiers cannot, so it
stands to reason you can't import something with that shape of name.

zsh -f -o posixidentifiers -c 'Stéphane=2; echo $Stéphane'
zsh:1: command not found: Stéphane=2
éphane

In effect the environment is always treated as POSIX_IDENTIFIERS.

POSIX_IDENTIFIERS <K> <S>
     When this option is set, only the ASCII characters a to z, A to Z,
     0 to 9 and _ may be used in identifiers (names of shell parameters
     and modules).