[Bug python/23544] New: Segmentation fault when executing: python gdb.execute("interp mi '-break-list'")

["ovparvu at microsoft dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=23544

            Bug ID: 23544
           Summary: Segmentation fault when executing: python
                    gdb.execute("interp mi '-break-list'")
           Product: gdb
           Version: HEAD
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: ovparvu at microsoft dot com
  Target Milestone: ---

For reproducibility purposes details about the host and the sequence of
executed commands is given below. As a side note gdb was compiled with python
support.

$ neofetch
            .-/+oossssoo+/-.               user@pc 
        `:+ssssssssssssssssss+:`           --------------- 
      -+ssssssssssssssssssyyssss+-         OS: Ubuntu 18.04.1 LTS x86_64 
    .ossssssssssssssssssdMMMNysssso.       Host: <Sanitized>
   /ssssssssssshdmmNNmmyNMMMMhssssss/      Kernel: 4.15.0-30-generic 
  +ssssssssshmydMMMMMMMNddddyssssssss+     Uptime: <Sanitized>
 /sssssssshNMMMyhhyyyyhmNMMMNhssssssss/    Packages: <Sanitized>
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Shell: bash 4.4.19 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   Resolution: <Sanitized>
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   DE: <Sanitized> 
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   WM: <Sanitized> 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   WM Theme: <Sanitized> 
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Theme: <Sanitized>
 /sssssssshNMMMyhhyyyyhdNMMMNhssssssss/    Icons: <Sanitized>
  +sssssssssdmydMMMMMMMMddddyssssssss+     Terminal: terminator 
   /ssssssssssshdmNNNNmyNMMMMhssssss/      CPU: <Sanitized>
    .ossssssssssssssssssdMMMNysssso.       GPU: <Sanitized>
      -+sssssssssssssssssyyyssss+-         GPU: <Sanitized>
        `:+ssssssssssssssssss+:`           Memory: <Sanitized>
            .-/+oossssoo+/-. 

$ <Sanitized>/gdb
GNU gdb (GDB) 8.2.50.20180816-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word".
(gdb) python gdb.execute("pwd")
Working directory /tmp.
(gdb) interp mi '-break-list'
^done,BreakpointTable={nr_rows="0",nr_cols="6",hdr=[{width="7",alignment="-1",col_name="number",colhdr="Num"},{width="14",alignment="-1",col_name="type",colhdr="Type"},{width="4",alignment="-1",col_name="disp",colhdr="Disp"},{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},{width="10",alignment="-1",col_name="addr",colhdr="Address"},{width="40",alignment="2",col_name="what",colhdr="What"}],body=[]}
(gdb) python gdb.execute("interp mi '-break-list'")
Segmentation fault

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