The problem: a colleague has a script which dies early, something like this (with the
+ [ 2 -eq 2 ] + break + exit
The corresponding shell (KSH, but same results in BASH):
if [ $cond1 -eq $cond2 ] then break fi # Lots of commented out code more commands ...
The curiosity: why the early exit? The logic does not have an exit anywhere nearby; the commands following do not call exit.
Follow Sherlock Holmes' dictum,
How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth? (The Sign of the Four) The only thing left is the commented out code.
# Blah, blah # Something with $(hidden command) buried inside # More blahbage
I had completely forgotten that the shell expands variables even inside comments! In this case, the expanded
$(hidden command) blew up and caused the shell to exit prematurely. Caveat plicator.