Comment 1 for bug 1934505

seen with the trunk 20210630, and the gdb-12 branch 20210705 on s390x-linux-gnu:

$ gdb /bin/ls
GNU gdb (Ubuntu 11.0.90.20210705-0ubuntu1) 11.0.90.20210705-git
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Reading symbols from /bin/ls...
(No debugging symbols found in /bin/ls)
(gdb) run
Starting program: /usr/bin/ls
/home/ubuntu/tmp/gdb-11.0.90.20210705/gdb/linux-tdep.c:2550: internal-error: displaced_step_prepare_status linux_displaced_step_prepare(gdbarch*, thread_info*, CORE_ADDR&): Assertion `gdbarch_data->num_disp_step_buffers > 0' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
Command aborted.
(gdb)