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-rw-r--r--src/vm.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/src/vm.c b/src/vm.c
index c3fbc944f..127fe70b1 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -560,8 +560,18 @@ SCM_DEFINE (scm_vm_save_stack, "vm-save-stack", 1, 0, 0,
SCM *dest;
SCM_VALIDATE_VM (1, vm);
vp = SCM_VM_DATA (vm);
- vp->last_frame = vm_heapify_frames_1 (vp, vp->fp, vp->sp, &dest);
- vp->last_ip = vp->ip;
+
+ if (vp->fp)
+ {
+ vp->last_frame = vm_heapify_frames_1 (vp, vp->fp, vp->sp, &dest);
+ vp->last_ip = vp->ip;
+ }
+ else
+ {
+ vp->last_frame = SCM_BOOL_F;
+ }
+
+
return vp->last_frame;
}
#undef FUNC_NAME