What were you trying to do that didn't work?

Run qemu-trace-stap with `qemu-tools` installed, but without manually installing any other packages.

Please provide the package NVR for which bug is seen:

qemu-kvm-9.0.0-6.el9

How reproducible:

100%

Steps to reproduce

1. after installing qemu-tools, but not manually adding any extra dependencies, try the following (as of this bug report, that means systemtap-client and systemtap-devel are not installed by default):
2. qemu-trace-stap run `which qemu-io` 'nbd_send*'
3.  

Expected results

No python stack trace when systemtap-client is not installed.

We don't want to necessarily have qemu-tools drag in the entire systemtap ecosystem on every system, so our options are to split qemu-tools into two RPMs (with a new RPM for qemu-trace-stap and the proper dependency on /usr/bin/stap), or to keep the current packaging scheme where systemtap is not a dependency, but where the qemu-trace-stap script itself gives a graceful error message about needing to install stap rather than dumping a stack trace.

Actual results

Traceback (most recent call last):
File "/usr/bin/qemu-trace-stap", line 169, in <module>
main()
File "/usr/bin/qemu-trace-stap", line 165, in main
args.func(args)
File "/usr/bin/qemu-trace-stap", line 83, in cmd_run
subprocess.call(stapargs)
File "/usr/lib64/python3.12/subprocess.py", line 389, in call
with Popen(*popenargs, **kwargs) as p:
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.12/subprocess.py", line 1026, in {}init{}
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/lib64/python3.12/subprocess.py", line 1955, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'stap'