[Bug rust/31517] New: GDB 15 broke Rust upstream GDB tests

["liushuyu011 at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31517

            Bug ID: 31517
           Summary: GDB 15 broke Rust upstream GDB tests
           Product: gdb
           Version: HEAD
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rust
          Assignee: unassigned at sourceware dot org
          Reporter: liushuyu011 at gmail dot com
  Target Milestone: ---

Created attachment 15423
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15423&action=edit
Error logs

Hi there,

Recently, I tried building and running Rust 1.76 testsuites on my device, and I
encountered a slew of errors when the test runner started to run GDB-related
tests.

The errors were like this: (see the log file attached).

I remember those tests passing before, so I did some digging on GDB, and I
found this commit:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=b0dd661fa16a424f059b1e1d80e779508b1a9a12
that caused this kind of error.

I am unsure if this new behaviour is intentional. If it is, how should someone
print out the size of a Rust slice in this case?

I have also opened a bug report on the Rust upstream:
https://github.com/rust-lang/rust/issues/122751, in case GDB cannot do anything
to fix this situation (so that Rust upstream can fix their tests instead).

Thanks!

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