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Add a test case for Bug#18884 "lock table + global read lock = crash"
(the bug itself is not repeatable any more).
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@ -68,3 +68,10 @@ ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
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delete t2 from t1,t2 where t1.a=t2.a;
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ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
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drop table t1,t2;
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drop table if exists t1;
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create table t1 (a int);
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lock table t1 write;
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flush tables with read lock;
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ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
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unlock tables;
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drop table t1;
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