SAS Oddities/Input issues

Thought I would share this little incredibly irritating tidbit;
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data one;
infile in1 delimiter=',' truncover dsd lrecl=13;
input visitnumber $ flights blocks ;

label flights = 'Flights per day';
blocks = 'Blocks per day';
run;
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Ok - When you are reading in comma delimited text of varying width AND you are being efficient and including a label statement to help your users, (This is the irritating part) and when you accidentaly use that extra ';' after the first label statement - SAS reads in the comma delimited file just fine, it then hits the 'flights' label and creates the label - SAS then begins feeding you "invalid numeric data" for your 'blocks' variable. A subsequent Proc Print will show the first two variables as having values and the third variable with no values.

Believe me when I say that you and your cooworkers can stare at the code for quite some time without realizing what that inapropriate ';' is doing to your data.

The correct code is obviously;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
data one;
infile in1 delimiter=',' truncover dsd lrecl=13;
input visitnumber $ flights blocks ;

label flights = 'Flights per day'
blocks = 'Blocks per day';
run;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sans the first ';' and all is well, three variables with two labels all with values, rather then three variables with values and one with no data.