[Bug cli/33189] New: Incorrect sizeof(long) output on x86_64-pc-linux-gnu

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=33189

            Bug ID: 33189
           Summary: Incorrect sizeof(long) output on x86_64-pc-linux-gnu
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: cli
          Assignee: unassigned at sourceware dot org
          Reporter: sam at gentoo dot org
  Target Milestone: ---

On x86_64-pc-linux-gnu, I see:
```
$ gdb
(gdb) p sizeof(long)
$1 = 4
```

which is incorrect.

If I load a file, everything's then fine:
```
(gdb) file /bin/bash
Reading symbols from /bin/bash...
Reading symbols from /usr/lib/debug/usr/bin/bash.debug...
(gdb) p sizeof(long)
$2 = 8
```

```
$ gdb --version
GNU gdb (Gentoo 9999 vanilla) 17.0.50.20250720-git
Copyright (C) 2024 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.
```

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