I have been prodding the memory fault problem on my 64bit machine ans have narrowed it down to one function: gtk-list-store-newv
when called like (gtk-ffi:gtk-list-store-new '(:string :string)) this function consistently produces unhandled memory fault errors (at #x4000000056 for '(:string :string)) when passed anything that is length 2 or more or contains strings (the '(:string :string) example is what (test-gtk:gtk-demo) calls). the type signature looks like a match to the header files on my system. for reference I am using sbcl 1.0.50 on Archlinux x86_64 with gtk and sbcl compiled 64bit and a fresh (as of an hour ago) pull of cells-gtk3 from https://github.com/Ramarren/cells-gtk3.git I am happy to help in any way I can and can provide more information if needed. Thanks for the great library, Jimmy -- "Open-source software has fewer bugs because it admits the possibility of bugs." Paul Graham
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