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bug#35681: Regression in --enable-minimal-config

From: Martijn Dekker
Subject: bug#35681: Regression in --enable-minimal-config
Date: Sun, 12 May 2019 12:47:46 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

Op 11-05-19 om 13:08 schreef Miro Kropáček:
It seems --enable-minimal-config isn't tested very often as both
4.3.48 and 4.2.x required a few #ifdef's to be added to make it
compile (Linux).

I think you're probably hitting this bug:


The exit status of subshells is broken in bash-4.3 and bash-4.4 with --enable-minimal-config. This is a fatal bug that would easily break most substantial shell scripts, including configure.

The bug was fixed in bash-5.0.

As for a minimal bash-5.0 with full POSIX compliance, aliases are required by POSIX but turned off by the minimal config, so you want: --enable-minimal-config --enable-alias --enable-strict-posix-default

I now often test modernish (my shell language enhancement library) against that shell configuration (among many others), so --enable-minimal-config is now a little better tested than before.

modernish -- harness the shell

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