1 files changed, 10 insertions, 2 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 6dc79118a..073a113fb 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1840,12 +1840,19 @@ static BcStatus bc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
                 for (q = 0; (!s && n[len] != 0) || bc_num_compare(n, p, len) >= 0; ++q)
                         bc_num_subArrays(n, p, len);
                 c->num[i] = q;
+                // a=2^100000
+                // scale=40000
+                // 1/a <- without check below, this will not be interruptible
+                if (G_interrupt) {
+                        s = BC_STATUS_FAILURE;
+                        break;
+                }
         }
 
         bc_num_retireMul(c, scale, a->neg, b->neg);
         bc_num_free(&cp);
 
-        return BC_STATUS_SUCCESS; // can't make void, see bc_num_binary()
+        return s;
 }
 
 static BcStatus bc_num_r(BcNum *a, BcNum *b, BcNum *restrict c,
@@ -1864,7 +1871,8 @@ static BcStatus bc_num_r(BcNum *a, BcNum *b, BcNum *restrict c,
         }
 
         bc_num_init(&temp, d->cap);
-        bc_num_d(a, b, c, scale);
+        s = bc_num_d(a, b, c, scale);
+        if (s) goto err;
 
         if (scale != 0) scale = ts;