Bug#629184: file_pager_write_page: Assertion `block' failed
ext2fs: device:hd0s1: warning: FILESYSTEM NOT UNMOUNTED CLEANLY; PLEASE fsck
file_pager_write_page: Assertion `block' failed
Root filesystem become unresponsive, machine unusable.
Kvm vm with ram 1GB, disk 10GB logical volume, installed with netinst.iso (30-May-2011 17:41 129M).
Reproducible, it happens during every gnash build. Last one during autoconf run.