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From: "tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug rust/30211] Crash on tab completing while debugging rust
 program
Date: Sat, 18 Mar 2023 15:22:19 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30211

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
                 CC|                            |tromey at sourceware dot o=
rg
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-03-18

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
Confirmed.

I'm not totally sure what the bug is but the immediate issue
is violating a string contract.  completer.h:

            m_finished_storage.append (prev, range.first);

(top-gdb) print prev
$16 =3D 0x7fffc4002f67 "is_contained_in::hf6f1247c1a3fce69"
(top-gdb) print range.first
$17 =3D 0x7fffc4002f40 "<&str as
core::str::pattern::Pattern>::is_contained_in::hf6f1247c1a3fce69"

That is, gdb is trying to append a range where the starting
iterator comes after the ending iterator.

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