[Bug rust/29735] Can't have multiple breakpoints - crash otherwise

["tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29735

--- Comment #10 from Tom Tromey <tromey at sourceware dot org> ---
(In reply to The Puzzlemaker from comment #9)
> Comment on attachment 15198 [details]
> Patch for this issue, or an issue similar to it
> 
> >From 07bb370168aab780c4780435ad3d9257ad8a474b Mon Sep 17 00:00:00 2001
> >From: ThePuzzlemaker <tpzker@thepuzzlemaker.info>
> >Date: Sat, 28 Oct 2023 13:28:33 -0500
> >Subject: [PATCH] Fix assertion fail from `rust_lang::print_enum`
> >
> >This commit fixes an assertion fail in `rust_lang::print_enum` related
> >to the handling of field numbers for variant types.
> >---
> > gdb/rust-lang.c | 12 +++++++++++-
> > 1 file changed, 11 insertions(+), 1 deletion(-)
> >
> >diff --git a/gdb/rust-lang.c b/gdb/rust-lang.c
> >index 74808ad0716..9acd2e1d2fa 100644
> >--- a/gdb/rust-lang.c
> >+++ b/gdb/rust-lang.c
> >@@ -470,8 +470,18 @@ rust_language::print_enum (struct value *val, struct ui_file *stream,
> >     }
> > 
> >   int variant_fieldno = rust_enum_variant (type);
> >-  val = value_field (val, variant_fieldno);

This code looks different on trunk.
IIRC I fixed a bug like this a while ago.
git says 2020 though, which seems wrong if you're using 13.

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