Oops, you forgot to negate your character classes! Also, the s option is useless because . wasn't used.

m/
    \n id:         # Match new line followed by id:
    [^\n]*         # 0 or more characters that are not new lines
    \n             # A newline
    ([^\n]*\n){4}) # The next 4 lines and store in $1
/x;                # Ignore whitespace
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