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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <161007085411.ZM19505@torch.brasslantern.com>
Date: Fri, 7 Oct 2016 08:54:11 -0700
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To: zsh-workers@zsh.org
Subject: TTY EOF ignored during read -d ?
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Try this from an interactive shell:

() { local -a lines; IFS=$'\n' read -d '' -A lines; print $#lines } 

I was not able to end the input by typing ctrl-D.  I initially thought
this might be related to the recent refactoring of execcmd(), but it
appears to be a long-standing problem, it also happens (with a named
function) in 4.2.0.