Path: csiph.com!optima2.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!usenet.stanford.edu!not-for-mail
From: jtmoon+bashbug@extrahop.com
Newsgroups: gnu.bash.bug
Subject: trap RETURN not set in calling function is overwritten by callee
Date: Tue, 18 Aug 2015 23:48:52 -0700 (PDT)
Lines: 35
Approved: bug-bash@gnu.org
Message-ID: <mailman.8636.1439998716.904.bug-bash@gnu.org>
NNTP-Posting-Host: lists.gnu.org
X-Trace: usenet.stanford.edu 1439998716 27820 208.118.235.17 (19 Aug 2015 15:38:36 GMT)
X-Complaints-To: action@cs.stanford.edu
To: bug-bash@gnu.org,bash@packages.debian.org
Envelope-to: bug-bash@gnu.org
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:message-id:date; bh=EYn9HJdQO1M6p9UGzhZuLbfAC+hGssd2BXw4RyGfyug=; b=ZtS9dtebdgxTVY9mHhCuYuJ2dFLfJ9zHlx5rQNaetmZwMU3i2qDAs1E0YPLjqN8laD VBABoojGzbEGIWq+MqAV0b8rb57lhpjzpcPMpk/17yexCNoAg5qMVH46fwQ7DzxRNlMT 4YhGLOl3oNUOMfX2J3qcef74wiGDLjbc5w6NKKIU3xUU8iYjJ8sDYM/6LhHpHb269J7M R/fc42BNgJUNkOn6trYzxyBSrU7eIIiQfyQQaEB6ckhB7MjAshmrNzBhPcTiQDE+VRq9 JVWaJCimOu9dTuXmGpOtl2ZKBauBsoMjjK/MPaPYbhvbcBIBa6lZvNSiIQqpiHZAEdHF Wulw==
X-Gm-Message-State: ALoCoQl9oNsjx62lB3FsWsnG7/G/2z7Ic7USr/a24PGPc15PZJfUsiaNcAIuoQnAgzVQeutxzlwm3FVeMMtsfI7ulSoFNK/rPA==
X-Received: by 10.70.90.98 with SMTP id bv2mr21733034pdb.36.1439966933255; Tue, 18 Aug 2015 23:48:53 -0700 (PDT)
X-Relaying-Domain: extrahop.com
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy]
X-Received-From: 209.85.192.97
X-Mailman-Approved-At: Wed, 19 Aug 2015 11:38:34 -0400
X-BeenThere: bug-bash@gnu.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Bug reports for the GNU Bourne Again SHell <bug-bash.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/bug-bash>
List-Post: <mailto:bug-bash@gnu.org>
List-Help: <mailto:bug-bash-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=subscribe>
Xref: csiph.com gnu.bash.bug:11397

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I../. -I.././include -I.././lib  -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall
uname output: Linux moonrock 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.3
Patch Level: 11
Release Status: release

Description:
	Given two functions wherein only one function sets a RETURN trap.  The other
        function will mistakenly call the other's RETURN trap upon it's return.

Repeat-By:
	# test trap RETURN if unset from called function
	function testU1() {
	    function _testU1_ret() { echo "${FUNCNAME}" ; }
	    trap _testU1_ret RETURN
	}
	function testU2() {
	    testU1
	    # when testU2 returns, will it call _testU1_ret ?
	}
	testU2
	# prints the following
	_testU1_ret
	_testU1_ret

Fix:
	For some reason the RETURN traps are not being stacked.  Instead, the
	current RETURN trap is just overwritten.