bug#3947: 23.1.50; gdb-mi does "list :1" and gets "No source file named ." on installed executables

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the [email protected] mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I have an executable compiled with -g and installed (copied to some
other directory, or just to another name).  gdb run by hand is fine with
debugging the installed file, and gdb-mi shows the source correctly (so
it's finding the source files fine), but something goes wrong in gdb-mi:

    (gdb) break main
    Breakpoint 1 at 0x80483fd: file test/hello.c, line 7.
    (gdb) list :1
    No source file named .

and subsequent commands all get the same error.  I presume this is
happening in gdb-place-breakpoints, where gdb-location-alist seems
always to be nil (I guess it should not be).

Everything works fine with the original executable.

In GNU Emacs 23.1.50.1 (i486-pc-linux-gnu, GTK+ Version 2.16.5)
 of 2009-07-27 on tiny.isode.net, modified by Debian
 (emacs-snapshot package, version 1:20090725-1)
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.1.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.1.50/site-lisp:/usr/share/emacs/site-lisp' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g -Wl,--as-needed' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  show-paren-mode: t
  gud-tooltip-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
t C-s C-s C-e <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <return> ( r e q u i r 
e SPC ' a u t o c o n f - e d i t ) <return> C-p C-e 
C-x C-e C-x C-s C-x 0 C-x b * g u <tab> <return> <mouse-movement> 
<mouse-movement> C-x C-f / a r c h / e m a <tab> / 
l i s p <tab> p r o g <tab> g d b <tab> <return> C-s 
" l i s t C-s C-s C-s C-s C-s C-s C-a <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
C-x k * g u <tab> <return> y e s <return> M-x g d b 
<return> / t m p <M-backspace> <M-backspace> <M-backspace> 
/ t m p / h e l l o <return> b r e a k SPC m a i n 
<return> n <return> r u n <return> n <return> <return> 
<return> n <return> c <return> q <return> y e s <return> 
M-x g d b <return> <return> b r e a k SPC m a i n <return> 
r u n <return> q <return> y e s <return> M-x g d b 
<return> M-b M-b M-d a u t o / t m p f s / b i n <return> 
b r e a k SPC m a i n <return> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <help-echo> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <help-echo> <mouse-movement> <mouse-movement> 
M-x r e p o r t <tab> b <backspace> <return>

Recent messages:
Ispell process killed
Starting new Ispell process [default] ...
OVERVIEW
Mark set
The program is not being run.
Mark set [11 times]
The program is not being run.
Mark set
OVERVIEW
Mark set [5 times]

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