Changeset 71f276 in git

Timestamp:

Sep 26, 2019, 2:48:03 PM (5 years ago)

Author:

Karim Abou Zeid <karim23697@…>

Branches:

(u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')

Children:

2574a6f0f5bbc739d3f3b8ef45f4bc19de2f03b9

Parents:

933f60e6d6c0e0f2cf64312957459d781e2153f4

Message:

Fix crash in lp_subst

File:

• libpolys/polys/shiftop.cc (modified) (4 diffs)

libpolys/polys/shiftop.cc

@@ -600 +600 @@
   int lV = r->isLPring;
 
-  number m1Coeff = pGetCoeff(m1);
+  number m1Coeff = n_Copy(pGetCoeff(m1), r->cf); // important to copy
 
   int hole = lV * at;
@@ -803 +803 @@
 poly p_mLPSubst(poly m, int n, poly e, const ring r)
 {
+  assume(p_GetComp(e, r) == 0);
   if (m == NULL) return NULL;
 
@@ -810 +811 @@
   poly res = p_One(r);
   poly remaining = p_Head(m, r);
+  p_SetComp(res, p_GetComp(remaining, r), r);
+  p_SetComp(remaining, 0, r);
   for (int i = 0; i < degbound; i++)
   {
@@ -818 +821 @@
 
       poly left = p_GetExp_k_n(remaining, startOfBlock, r->N, r);
-      p_SetCoeff(left, p_GetCoeff(remaining, r), r);
+      p_SetCoeff(left, n_Copy(p_GetCoeff(remaining, r), r->cf), r);
       p_mLPunshift(left, r);