c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');
c_func('AAA:BBB');

##</code><code>##

AAA - BBB
CCC - DDD
CCC - DDD

##</code><code>##

for(1 .. 10) {c_func('AAA:BBB')}

##</code><code>##

Use of uninitialized value $1 in concatenation (.) or string at try.pl line 10.
Use of uninitialized value $2 in concatenation (.) or string at try.pl line 10.
 -
Use of uninitialized value $1 in concatenation (.) or string at try.pl line 10.
Use of uninitialized value $2 in concatenation (.) or string at try.pl line 10.
 -
AAA - BBB
CCC - DDD
Use of uninitialized value $1 in concatenation (.) or string at try.pl line 10.
Use of uninitialized value $2 in concatenation (.) or string at try.pl line 10.
 -
AAA - BBB
CCC - DDD
AAA - BBB
CCC - DDD
CCC - DDD