$last_alias isn't needed; there's no reason to treat loops of length 2
(alias a=b b=a) differently to loops of length 1 (alias a=a), length 3
(alias a=b b=c c=a), or length N.
The «(( $+seen_alias[$arg] ))» check is redundant as of the last commit:
the enclosing condition ensures that $res is "alias", which implies that
«(( $+seen_alias[$arg] ))» is false.
occurred on zsh-5.0.7 and older but I don't have zsh-5.0.7 handy to test
on.)
Evidently, the issue was due to elision.
This addresses #665.0 and #665.5.
The test point is XPASSing, which makes CI red. As a duct tape measure to turn
CI green again, update the test expectations to make it XFAIL. The hacky part
is that the expectation set by this commit will never be met; the test point
will never XPASS now until its expectations are changed again.
Issue #623 remains open to track setting the test expectation to the correct
value (i.e., make the test XFAIL in a manner that _will_ XPASS if the bug is
fixed; in other words, pay off the technical debt created by this commit).
Issue #616 remains open to fix the actual bug.
The effect of the bug was that «-:» was considered an option taking an argument
(see the parsing of the associative array in lines 692-693).
As to preventing recurrence, add a warning comment. We _could_ change
the separator from colon to something else, but colon is idiomatic for
this use (see, e.g., passwd(5)), and the problem will be unlikely to
recur if and when we add a third field to the assoc's values. (For
example, jexec(1), chroot(1), and even ssh(1) would benefit from a third
field saying how many positional arguments to skip before the positional
argument that's to be the command word — though in the last two cases,
specifying an "inner" command is optional.)
As of this writing, it seems that the 'type' builtin poisons the commands hash
in a way that breaks AUTO_CD to absolute paths that don't end with a slash.
* i511-bang-pipeline:
main: Fold '!' handling in to the 'case'. No functional change.
Fix indentation. No functional change.
main: Fix highlighting of the ! precommand after array assignments. Add tests.
main: Highlight the ! precommand as an error when not at the start of a pipeline.
