WARN - error parsing file with regexp

Appears to be slightly different from FE-182.

WARN - error parsing file with regexp <
([%@!?=$\s]+)? # leading punctuation (opt)
([\p

\p

._:-]+ ) # tag name
(([^>]|"[^"]"|'[^']')*) # attributes etc (opt)
([%@!?=$\s]+)? # trailing punctuation (opt)
(/\s*)? # trailing slash (opt)
> on file <stream> offset 874, starting with: < operatio
java.lang.StackOverflowError
at com.cenqua.fisheye.io.Utf16ERandomAccessIoStream.seek(Utf16ERandomAccessIoStream.java:17)
at com.cenqua.fisheye.io.BufferedCharSequence.charAt(BufferedCharSequence.java:45)
at com.cenqua.fisheye.syntax.r.BitClass.match(BitClass.java:47)
at com.cenqua.fisheye.syntax.r.Branch.match(Branch.java:17)
at com.cenqua.fisheye.syntax.r.Branch.match(Branch.java:17)
at com.cenqua.fisheye.syntax.r.GroupHead.match(GroupHead.java:22)
at com.cenqua.fisheye.syntax.r.Loop.match(Loop.java:42)
...