Gentoo's Bugzilla –
Attachment 327128 Details for
Bug 438934dev-lang/smlnj-110.75 - unexpected exception (bug?) in SML/NJ: Io [Io: openIn failed on "/tmp/portage/dev-lang/smlnj-110.75/work/sml.boot.x86-unix/smlnj/.cm/x86-unix/cm.cm", No such file or directory]