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A similar issues is now discussed in the following thread on upstream ML: http://www.zsh.org/mla/workers/2015/msg01897.html Two patches were applied to address it recently: http://sourceforge.net/p/zsh/code/ci/99586845 http://sourceforge.net/p/zsh/code/ci/df5f8255 The solution does not seem to be ready for RHEL yet. One of the patches currently breaks the upstream test-suite on Intel x86_64: http://www.zsh.org/mla/workers/2015/msg01961.html
The following upstream commit makes the test-suite work again: http://sourceforge.net/p/zsh/code/ci/a07f74fa
Yet another follow-up commit upstream: http://sourceforge.net/p/zsh/code/ci/93ca77f8
Two more upstream commits on this topic: http://sourceforge.net/p/zsh/code/ci/1af2e6e0 http://sourceforge.net/p/zsh/code/ci/128bf385
One more commit upstream: http://sourceforge.net/p/zsh/code/ci/5d019f42
One more commit upstream: http://sourceforge.net/p/zsh/code/ci/9f5dffa1
The above patches may change the order of execution under some circumstances, which can be observed as a change in behavior inappropriate for RHEL-6 in its current phase of life. I am moving this bug to RHEL-7 but for RHEL-6 I will pick the fixes that look safe enough to be applied on RHEL-6 (the signal queuing guards around code using heap memory allocation). I will use bug #1311166 for the RHEL-6 fixes.
*** Bug 1311172 has been marked as a duplicate of this bug. ***
I have picked one more upstream commit to make sure that pattern matching will not become less interruptible because of the other upstream patches that were backported: http://sourceforge.net/p/zsh/code/ci/8672d19f
This seems to be also related (although more about interactive use of zsh): https://sourceforge.net/p/zsh/code/ci/f4dfca49
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2152.html