Bug #76531 main.error_simulation creates and leaves behind it a file: mysql-test/FF
Submitted: 30 Mar 2015 12:37 Modified: 1 Apr 2015 13:44
Reporter: Guilhem Bichot Email Updates:
Status: Closed Impact on me:
None 
Category:Tests: Server Severity:S3 (Non-critical)
Version:5.7 OS:Any
Assigned to: CPU Architecture:Any

[30 Mar 2015 12:37] Guilhem Bichot 
Description:
main.error_simulation creates and leaves behind it a file: mysql-test/FF.
It's because of this line:
set debug=OFF;
The developer probably wanted to turn off debug output, but due to the special syntax of "set debug", it is interpreted as "O to FF" i.e. "send debug output to a file named FF".

Verified with trunk and 5.7. Introduced by the fix for
bug#11747548 nisha.gopalakrishnan@oracle.com

It is a problem, because an otherwise clean tree looks unclean:
> git status -s
?? mysql-test/FF

How to repeat:
./mtr --embedded --mem main.error_simulation

then 

ls top_src_dir/mysql-test/FF

Suggested fix:
look at how other test files reset "debug"
[1 Apr 2015 13:44] Paul DuBois 
Fixed in 5.7.7. Changes for test suite. No changelog entry needed.