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MDEV-4897 - Assertion `share->tdc.prev == 0 && share->tdc.next == 0'
failed in TABLE_SHARE* tdc_acquire_share(THD*, const char*, const char*, const char*, uint, uint, TABLE**) Removed false assertions. When multiple threads acquire the same previously unused share, only one thread shall remove share from unused list (the one that has was_unused == true). Other threads will ignore this step and may continue even if share is not yet removed from unused list.
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@ -847,7 +847,6 @@ TABLE_SHARE *tdc_acquire_share(THD *thd, const char *db, const char *table_name,
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if ((*out_table= tc_acquire_table(thd, share)))
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{
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DBUG_ASSERT(!(flags & GTS_NOLOCK));
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DBUG_ASSERT(!share->tdc.prev && !share->tdc.next);
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DBUG_ASSERT(!share->error);
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DBUG_ASSERT(!share->is_view);
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DBUG_RETURN(share);
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@ -898,7 +897,6 @@ TABLE_SHARE *tdc_acquire_share(THD *thd, const char *db, const char *table_name,
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}
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mysql_mutex_unlock(&LOCK_unused_shares);
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}
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DBUG_ASSERT(share->tdc.prev == 0 && share->tdc.next == 0);
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end:
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DBUG_PRINT("exit", ("share: 0x%lx ref_count: %u",
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