The first is a syntax error which caused the perl on my machine (Activeperl 5.8.8 build 822) to spit out:

panic: ck_grep at C:/Documents and Settings/bri/workspace/PerlMonks/te
+mp.pl
    line 10 (#1)
    (P) Failed an internal consistency check trying to compile a grep.
    
Uncaught exception from user code:
    panic: ck_grep at C:/Documents and Settings/bri/workspace/PerlMonk
+s/temp.pl lin
e 10.
 at C:/Documents and Settings/bri/workspace/PerlMonks/temp.pl line 10
[download]

What did you really mean it to say?