[Bug 251770] /bin/sh: false expansion

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251770

--- Comment #2 from Steffen (Daode) Nurpmeso <steffen at sdaoden.eu> ---
Sorry for being too terse.
It was just a simplemost reproducer without any further comments.
Sorry.

#?2|kent$ for s in dash bash mksh bosh; do $s -c 'du=ich wir='"'"'hey '"'"'$du;
echo $wir'; done
hey ich
hey ich
hey ich
hey ich

Hmmmm.  Since issue 1123 is possibly not, you surely mean instead

75501          Variable assignments shall be performed as follows:
75502             •   If no command name results, variable assignments shall
affect the current execution
75503                 environment.
75504             •   If the command name is not a special built-in utility or
function, the variable assignments
75505                 shall be exported for the execution environment of the
command and shall not affect the
75506                 current execution environment except as a side-effect of
the expansions performed in step
75507                 4. In this case it is unspecified:
75508                   — Whether or not the assignments are visible for
subsequent expansions in step 4
75509                   — Whether variable assignments made as side-effects of
these expansions are visible for
75510                     subsequent expansions in step 4, or in the current
shell execution environment, or
75511                     both

where 4 is

5495                    4.    Each variable assignment shall be expanded for
tilde expansion, parameter expansion,
75496                          command substitution, arithmetic expansion, and
quote removal prior to assigning the
75497                          value.

So .. this very exact behaviour is unspecified?  If that is really true (i
personally have hard times with standard texts), this issue can very well be
closed.
(FreeBSD sh is alone with this exact behaviour as far as i know, still..)

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