If nobody explained such behavior yet, maybe it turns out to be a bug.

Despite different representation of compiled regular expression in 5.8.8 (the only difference is newline), the problem is the same: \E is quoted instead of been interpreted as closing end of \Q.

Thank you for your answer!

In reply to Re^2: Weird quoting with /x modifier by ykar
in thread Weird quoting with /x modifier by ykar

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