#72: SIGFPE with no exceptions currently enabled? --------------------+------------------------------------------------------- Reporter: rtoy | Owner: somebody Type: defect | Status: new Priority: major | Milestone: Component: Core | Version: 2013-01 Keywords: | --------------------+------------------------------------------------------- While I've seen this SIGFPE issue before, I never tracked it down. Here is a repeatable case (from Carl): {{{ (defun test (x y) (declare (optimize (speed 3) (safety 0)) (type (signed-byte 32) x y)) (the (signed-byte 32) (truncate x y))) }}} Although the code lies to the compiler (the asserted return type of {{{truncate}}} is incorrect), the point is that {{{(test #x-80000000 -1)}}} causes the SIGFPE exception.

I believe {{{sigfpe-handler}}} was only expecting to handle FP exceptions. In this example, the division causes an overflow which generates the SIGFPE.