eval "export NAME=" can return success even when zsh coerces the bare
assignment on an integer special parameter (SECONDS, RANDOM, SHLVL,
HISTSIZE, COLUMNS, LINES, USERNAME) instead of failing, leaving the
value unchanged. The old exit-status check then reported the name as
blanked when it was not -- a false receipt.
Classify on the observed effect instead: attempt the export, then read
the name's value back with the (P) indirection flag and decide from
whether it is now empty. One check now covers all three shapes a name
can take here -- a genuine blank, a fatal read-only error eval merely
contains, and this silent no-op -- with the exit status playing no
part in the decision.
Adds a test driving all three shapes through the real scrubScript in
one run (a normal name, LINENO for the fatal case, SECONDS for the
silent no-op), with the parent environment explicitly carrying those
names since a cleared ProcessBuilder parent does not expose them on
its own. Also corrects the previously-merged
unblankableNameInTheMiddleDoesNotAbortNamesAfterIt test, whose "exactly
one failed name" assertion turned out to only pass by accident: zsh
itself auto-exports SHLVL on every shell start, and the old exit-status
bug was silently miscounting it as blanked. The fixed classification
now correctly reports it unblankable too, so the test asserts presence
rather than an exact count.
Dai Ha
c670792ffe