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Sourcing a script from a pipe is not reliable

From: Jeremy
Subject: Sourcing a script from a pipe is not reliable
Date: Wed, 9 Jan 2019 20:11:21 -0800

Configuration Information [Automatically generated, do not change]:

Machine: Mac

OS: Darwin

Compiler: gcc

Compilation CFLAGS: Xcode

uname output: Darwin Octo.local 15.6.0 Darwin Kernel Version 15.6.0: Thu
Jun 21\

 20:07:40 PDT 2018; root:xnu-3248.73.11~1/RELEASE_X86_64 x86_64

Machine Type: x86_64-Apple-Darwin

Bash Version: 3.2

Patch Level: 48

Release Status: relase

Although bashbug listed the Patch Level as 48 (and misspelled "release")
the version string is

3.2.57(1)-release (x86_64-apple-darwin15)

This is on MacOS 10.11.6. If there is a better place for me to report this
bug, please let me know.


Sourcing a script from a pipe is not reliable.


This command line should run forever:

  i=0; while [ "_$(echo echo '$1' | . /dev/stdin yes)" = "_yes" ]; \

  do echo -n .; ((i++)); done; printf "\n%s\n" $i

When I run it, it usually terminates with $i much less than 1,000.

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