[v634] [cling] Add ROOT lock to LookupHelper::findType #18831
Merged
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Backport of #18237 and and #18551
This fixes #18236
As seen in cms-sw/cmssw#47763 (comment)
there are cases where the ROOT global lock is taken too late:
In the stack trace below the lock is requested on frame #7 where as
it should really be (also) requested on frame #12 as soon as the
transaction is being generated.
(cherry picked from commit 7c1f0a0)# This Pull request:
Changes or fixes:
Checklist:
This PR fixes #