freebsd stable - Sep 2006 - Mystery symbols made up by C++ at _low_ optimization levels

Could someone with knowledge of compilers, please, look at the PR 103610?

	http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/103610


One of the source files, when compiled (with -O0 or -O1), grows a symbol, that 
is not referenced anywhere else... Depending on the optimizations, the symbol 
name and the line-number change from `.LC786' and 181 with -O0 below:

loctest.o(.data+0x51c):/usr/ports/devel/icu/work/icu/source/test/intltest/loctest.cpp:181:
undefined reference to `.LC786'
loctest.o(.data+0x520):/usr/ports/devel/icu/work/icu/source/test/intltest/loctest.cpp:181:
undefined reference to `.LC786'

to `.LC779' and 185 with -O1...

Compiling with -O2 gets rid of the problem, but not everyone likes to do that.

I checked -- it does not come from any pre-processor magic. Any clues?

To reproduce, build the devel/icu port with -O1 and -g.

Thanks!

	-mi