The progra funit-stackframe just crashes. When run from fhpd nothing indicates that the program has stopped or terminated. $ ../bindir/fhpd (fhpd) help go go Continue running a process, returning without blocking. The go command resumes execution of a collection of processes. The prompt will then be returned so that the user can issue further commands; execution continues behind the scene. (fhpd) run ./funit-stackframe runState state = 0 Attached to process 0 (fhpd) go runState state = 1 (fhpd) where #0 0x00bfb840 in [unknown] (fhpd) where #0 0x00bfb840 in [unknown] (fhpd) go runState state = 1 (fhpd) where #0 0x00bfb840 in [unknown] (fhpd)