Hi, finally the problem turned out to be caused by libburn's wrong usage of the call parameter stack.
The copy source of the failing statement is allocated too small by the caller of function add_worker: struct write_opts write; and then copied with the size of union w_list_data This bug is hidden on amd64 even from valgrind. Probably because the surplus stack bytes are normally populated with other valid data. But sparc and gcc -O2 make the problem visible. libburn did this mistake for 8 years on several operating systems and processor architectures without any indication. The bug is supposed to be fixed by http://libburnia-project.org/changeset/5324 Thanks to Patrick Baggett who pointed this out against my initial resistence to believe in an error on libburn's side. Have a nice day :) Thomas -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org