MySQL Bugs: #4319: Stored procedure crash if self-referencing function

Bug #4319	Stored procedure crash if self-referencing function
Submitted:	29 Jun 2004 1:30	Modified:	10 Sep 2004 13:21
Reporter:	Peter Gulutzan	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	5.0.1-alpha-debug	OS:	Linux (SuSE 8.2)
Assigned to:	Per-Erik Martin	CPU Architecture:	Any

Description:
If I use a function's return value as an input value for the same function, I crash the server. 

How to repeat:
mysql> create table t (s1 int); 
Query OK, 0 rows affected (0.27 sec) 
 
mysql> insert into t values (5); 
Query OK, 1 row affected (0.00 sec) 
 
mysql> delimiter // 
 
mysql> create function f (p int) returns int begin declare v int; if p = 0 then set v = 0; else s                                  
et v = 1; end if; return v; end;// 
Query OK, 0 rows affected (0.00 sec) 
 
mysql> select f(f()) from t;// 
ERROR 2013 (HY000): Lost connection to MySQL server during query

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

The example given results in a "Incorrect number of arguments" (as it should).
When giving an argument to the innermost function, it works.