Emacs hangs upon loading cedet

I'm using current CVS cedet with the first Emacs 22 pretest tarball
(GNU Emacs 22.0.90.1 (i686-pc-linux-gnu, GTK+ Version 2.8.10) of
2006-11-07 on escher).  I've run across a file[1] that causes Emacs to
hang or loop infinitely when I try to visit it after loading cedet.
There are two cases (both with emacs -Q): 
(i) Do M-: (load-file "<path to>/cedet/common/cedet.el") and then
visit the file.  The file gets loaded into a buffer but then Emacs
immediately goes into a loop and consumes 100% CPU.  The loop can be
broken by C-g.
(ii) Do M-: (load-file "<path to>/cedet/common/cedet.el"), then M-:
(semantic-load-enable-code-helpers) and then visit the file.  Emacs
immediately hangs, consuming 100% CPU, without the file being visible
in a buffer.  C-g has no effect in this case, only kill -9.

I reproduced case (ii) under gdb and got the following lisp backtrace:
"byte-code" (0x8a51b73)
"byte-code" (0x8a51ba3)
"semantic-parse-stream-default" (0x8dfa3b5)
"semantic-parse-stream" (0x8dfa3b5)
"semantic-repeat-parse-whole-stream" (0x836da7d)
"semantic-parse-region-default" (0x8)
"semantic-parse-region" (0x8)
"semantic-fetch-tags" (0x0)
"semantic-create-imenu-index" (0x84c6101)
"imenu--make-index-alist" (0x83168f9)
"imenu-update-menubar" (0x82ce304)
"run-hooks" (0x8343631)
(I assume the problem is somewhere is the cedet or semantic lisp, but
maybe it's in the byte-code produced.  I can provide the C backtrace
if desired, which shows numerous calls to Fbyte_code.)