Shlomi Fish wrote:
> print (($text =~ m{\G(?=<)}cg) ? "True" : "False");

Zero-width match.  perlre(1):

#  Repeated Patterns Matching a Zero-length Substring
...
#      Thus Perl allows such constructs, by forcefully breaking the infinite
#      loop.  The rules for this are different for lower-level loops given by
#      the greedy quantifiers "*+{}", and for higher-level ones like the "/g"
#      modifier or split() operator.
#
#      The lower-level loops are interrupted (that is, the loop is broken)
#      when Perl detects that a repeated expression matched a zero-length
#      substring.
...
#      Similarly, for repeated "m/()/g" the second-best match is the match at
#      the position one notch further in the string.

Not a bug.

-zefram