Created by Alexey Kopytov and last modified
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491. By Alexey Kopytov

Bug #1200788: InnoDB: Failing assertion: trx_sys->descr_n_used
              <= (trx_sys->rw_trx_list).count in file trx0trx.cc line

The problem was in a debug-only assertion introduced when merging the
trx descriptor patch from 5.5.

The assertion’s invariant is supposed to be enforced whenever
trx_sys->rw_trx_list is modified, i.e. when trx_sys->mutex is
locked. Which is already done earlier in the same function. The same
assertion later (with trx_sys->mutex released) is therefore redundant
and has been removed.

484. By Laurynas Biveinis

Null-merge lp:percona-server/5.5 rev 588

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