[bug #42985] find reports "No such file or directory" when executing rm

[Andrii]

Follow-up Comment #5, bug #42985 (project findutils):

Thank you a lot for explanations - I am sure they will be valuable for
everyone who encounters similar error from `find rm`.

It also helped me to create following test case for huge amount of input data,
in which the suggestions don't seem to help.

Warning: the script puts high load on filesystem, so use it only in good test
environment.

mkdir -p 42985
(
set -e
cd 42985
echo creating many folders
for i in {1..10000}; do n=$(echo $i | md5sum); n=${n%% *}; mkdir $n; touch
$n/$n $n/${n}1 $n/${n}2 ; done > /dev/null
cpat='.sst'
if ! find $(pwd) . -mindepth 1 -maxdepth 1 -regex $cpat -prune -o -exec rm
-rfv {} \+ >/dev/null 2>../error.log ; then
        echo "there were errors:"
        head ../error.log
else
        echo success
fi
)

The produced output in my environment:

creating many folders
there were errors:
find: ‘./041f49053a1b6be294e4149b75b997b4’: No such file or directory
find: ‘./1b6bbdb9e57e72c47bca951947563fc9’: No such file or 
...

Please let me know if this looks like valid bug and whether I should create
dedicated report for it.

(I know the workaround will be using unique entries in input folder list or
handing one folder per call, just hopefully find can manage this job anyway).

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