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Subject: Re: Bug with traps and exit
To: zsh-workers@zsh.org
References: <C0CF1A8E-FD75-4024-BA4B-0C4D8880FB8D@dana.is>
 <3859b4bf-08ba-62d5-f00a-3ec4e67caf95@inlv.org>
 <d950fdd8-9c44-b5a4-3b32-dee87dc443f4@inlv.org>
From: Martijn Dekker <martijn@inlv.org>
Message-ID: <67fe10ef-275c-8724-1fc1-d6738fa5c0a4@inlv.org>
Date: Thu, 30 Jan 2020 15:01:23 +0100
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Another variant.

Strangely, this one is not detected when tried from within a loop.

====begin test script====
test_BUG_TRAPFNEXI() {
	{ test_result=$(
		my_pid=$(zsh -c 'echo "$PPID"')
		test_fn() {
			kill -s ALRM "$my_pid"
			print "stillhere"
		}
		trap "print 'trap'; exit" ALRM
		test_fn
	); }
	if [[ ${test_result} == $'trap\nstillhere' ]]; then
		print "bug found"
	else
		print "bug NOT found"
		return 1
	fi
}
test_BUG_TRAPFNEXI
while :; do
	test_BUG_TRAPFNEXI
	break
done
test_BUG_TRAPFNEXI
====end test script====

Output, as of zsh 5.1:

bug found
bug NOT found
bug found

The second line (the "NOT found" one) was when the bug test was tried 
within a dummy loop.

- Martijn

-- 
modernish -- harness the shell
https://github.com/modernish/modernish