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[Bug tapsets/18263] In tty tapset, driver_name can be null, causing a script to fail when probing tty.write or tty.read


https://sourceware.org/bugzilla/show_bug.cgi?id=18263

--- Comment #5 from Max Timchenko <maxvt at bu dot edu> ---
Thanks David, I have patched with attachment 8249 and the error no longer
occurs.

I can't see output differences (compared to other options in the thread or my
original fix) since my probe does a target set check before printing anything
and the troublesome tty does not belong to the target set, but as long as my
probe set doesn't bail immediately on start I'm happy.

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