This bug is just one facet of stored routines not being able to
detect changes in meta-data (WL#4179). This particular problem
can be triggered within a single session due to the improper
management of the pre-locking list if the view is expanded after
the pre-locking list is calculated.

Since the overall solution for the meta-data detection issue is
planned for a later release, for now a workaround is used to
fix this particular aspect that only involves a single session.
The workaround is to flush the thread-local stored routine cache
every time a view is created or modified, causing locally cached
routines to be re-evaluated upon invocation.

mysql-test/r/sp-bugs.result:
  Add test case result for Bug#50624.
mysql-test/t/sp-bugs.test:
  Add test case for Bug#50624.
sql/sp_cache.cc:
  Update function description.
sql/sql_view.cc:
  Invalidate the SP cache if a view is being created or modified.