Inconsistent number of columns

Hello,

I am bit surprised that a csv file containing several lines but one line with an extra column is read succesfully without raising any exception?
E.g.
column1;column2
data11;data12
data21;data22
data31;data32;data33
data41;data42

Is it the expected behavior? Is there an option to control this?
Any help will be appreciated.

Thanks
Vincent