main.sp-error stack overflow on MSAN-debug and UBASAN debug builders

CURRENT_TEST: main.sp-error

mysqltest: At line 2246: query 'call p1(1)' failed with wrong errno <Unknown> (2013): 'Lost connection to server during query', instead of  (0)...

The result from queries just before the failure was:

< snip >

create procedure proc_36510()

begin

declare should_be_illegal condition for 0;

declare continue handler for should_be_illegal set @x=0;

end$$

ERROR HY000: Incorrect CONDITION value: '0'

create procedure proc_36510()

begin

declare continue handler for 0 set @x=0;

end$$

ERROR HY000: Incorrect CONDITION value: '0'

set @old_recursion_depth = @@max_sp_recursion_depth;

set @@max_sp_recursion_depth = 255;

create procedure p1(a int)

begin

declare continue handler for 1436 -- ER_STACK_OVERRUN_NEED_MORE

select 'exception';

call p1(a+1);

end|

call p1(1);

More results from queries before failure can be found in /dev/shm/normal/4/log/sp-error.log