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-rw-r--r--libguile/vm-i-scheme.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/libguile/vm-i-scheme.c b/libguile/vm-i-scheme.c
index ef3d02b7c..2f1d5fe02 100644
--- a/libguile/vm-i-scheme.c
+++ b/libguile/vm-i-scheme.c
@@ -402,8 +402,12 @@ VM_DEFINE_FUNCTION (161, ash, "ash", 2)
if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
{
if (SCM_I_INUM (y) < 0)
- /* Right shift, will be a fixnum. */
- RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) >> -SCM_I_INUM (y)));
+ {
+ /* Right shift, will be a fixnum. */
+ if (SCM_I_INUM (y) > -SCM_I_FIXNUM_BIT)
+ RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) >> -SCM_I_INUM (y)));
+ /* fall through */
+ }
else
/* Left shift. See comments in scm_ash. */
{