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

[Bruce Stephens]

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 emacs-pretest-bug@gnu.org 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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