bug#25844: 26.0.50; gdb doesn't respect '$INSIDE_EMACS' shell variables

bug#25844: 26.0.50; gdb doesn't respect '$INSIDE_EMACS' shell variables

[Mohammed Sadiq]

M-x gdb doesn't seem to respect variables set with '$INSIDE_EMACS'

Ie, my bashrc has some variables set as:
if [ '$INSIDE_EMACS' ]
   foo='FOO'
   bar='BAR'
fi

And when I run M-x gdb, it seems not to work.

Instead, if I run emacs this way: foo='FOO' emacs
and run gdb, the variable is respected

The variable I was trying to set was G_DEBUG='fatal-criticals'

Thanks


In GNU Emacs 26.0.50.3 (x86_64-pc-linux-gnu, GTK+ Version 3.22.6)
 of 2017-02-05 built on rose
Repository revision: 148100d98319499f0ac6f57b8be08cbd14884a5c
Windowing system distributor 'The X.Org Foundation', version 11.0.11901000
System Description:	Debian GNU/Linux 9.0 (stretch)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 LIBSYSTEMD

Important settings:
  value of $LC_MONETARY: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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  mouse-wheel-mode: t
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  auto-composition-mode: t
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  auto-compression-mode: t
  line-number-mode: t
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Load-path shadows:
None found.

Features:
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term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
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format env code-pages mule custom widget hashtable-print-readable
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make-network-process emacs)

Memory information:
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 (symbols 48 20259 1)
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 (strings 32 18154 4104)
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bug#25844: 26.0.50; gdb doesn't respect '$INSIDE_EMACS' shell variables

[Glenn Morris]

Mohammed Sadiq wrote:

> M-x gdb doesn't seem to respect variables set with '$INSIDE_EMACS'
>
> Ie, my bashrc has some variables set as:
> if [ '$INSIDE_EMACS' ]
>    foo='FOO'
>    bar='BAR'
> fi
>
> And when I run M-x gdb, it seems not to work.

When Emacs runs a debugger, it does not use a shell to do so,
so your .bashrc isn't consulted. In general external processes that
Emacs starts don't go via a shell unless they really need to.
I don't think this is an Emacs bug.