This bug was fixed in the package gdb - 8.1-0ubuntu3
---------------
gdb (8.1-0ubuntu3) bionic; urgency=medium
* Update, taken from the gdb-8.1-branch 20180409.
* Use bash instead of /bin/sh as this script uses arrays which require bash.
(Trent Lloyd). LP: #1762320.
-- Matthias Klose <d...@ubuntu.com> Mon, 09 Apr 2018 11:31:42 +0200
** Changed in: gdb (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1762320
Title:
gcore does not execute, uses /bin/sh but requires bash
Status in gdb package in Ubuntu:
Fix Released
Bug description:
gcore fails to execute on bionic
$ gcore
/usr/bin/gcore: 28: /usr/bin/gcore: Syntax error: "(" unexpected
Line 28 is:
28 dump_all_cmds=()
This appears to be bash syntax for arrays (as reinforced further down)
which is not compatible with the /bin/sh shebang using dash.
Upstream has a recent commit to move this from /bin/sh to bash (along also
making other changes to fix problems with quoting within the same commit):
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=e1e6f073a9f5d7c3183cb8096fb24a42c28ba36b
As a minimum fix we should probably change it from /bin/sh to
/bin/bash
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