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Re: Reproducible, simple bug; g++ toolchain / std::string bug?


On Fri, 7 Apr 2006, Steven Brown wrote:

I've run into what appears to be a bug in the g++ toolchain or the STL's
std::string using the latest Cygwin dist (up to date as of right now).
Minimal test case attached.

If my shared library does a callback to a function returning
std::string, and only if the std::string is empty, I get an abort when
that std::string is destroyed.

The attached files will show this bug - run make and the xxx-cygwin.exe
that's produced and it will abort.  The same will happen if you use
libtool to build it the right way - the autoconf/ dir in the bug's
repository[1] can be used for that if you want to see it (copy it into
the main dir, ./autogen.sh && make).

Any ideas as to where the problem lies or how to further identify it?

Sure. This has been discussed on this list a few times this year -- see the list archives. A Google search for "cygwin dll std:string" should show some mathces (including a reference to the GCC bug report[*] for this, which, AFAICS, contains a patch that you can test). Igor [*] <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24196> -- http://cs.nyu.edu/~pechtcha/ |\ _,,,---,,_ pechtcha@cs.nyu.edu | igor@watson.ibm.com ZZZzz /,`.-'`' -. ;-;;,_ Igor Peshansky, Ph.D. (name changed!) |,4- ) )-,_. ,\ ( `'-' old name: Igor Pechtchanski '---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow!

"Las! je suis sot... -Mais non, tu ne l'es pas, puisque tu t'en rends compte."
"But no -- you are no fool; you call yourself a fool, there's proof enough in
that!" -- Rostand, "Cyrano de Bergerac"

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