Changeset 756dc7 in git

Timestamp:

Apr 21, 2020, 2:39:39 PM (3 years ago)

Author:

Karim Abou Zeid <karim23697@…>

Branches:

(u'spielwiese', '828514cf6e480e4bafc26df99217bf2a1ed1ef45')

Children:

8e903f23324de1e4ec1dc9926b6de0a16de605d6

Parents:

f3be8e67518a43d2fdb745cb875edc24988c90a7

Message:

Fix segfault because of components in LP

File:

• libpolys/polys/shiftop.cc (modified) (2 diffs)

libpolys/polys/shiftop.cc

@@ -594 +594 @@
 
 // splits a frame (e.g. x(1)*y(5)) m1 into m1 and m2 (e.g. m1=x(1) and m2=y(1))
-// according to p which is inside the frame
-// at is the number of the block, starting at 1
+// at is the number of the block to split at, starting at 1
 void k_SplitFrame(poly &m1, poly &m2, int at, const ring r)
 {
@@ -604 +603 @@
 
   m2 = p_GetExp_k_n(m1, 1, split, r);
+  p_SetComp(m2, 0, r); // important, otherwise both m1 and m2 have a component set, this leads to problems later
+  p_Setm(m2, r); // p_mLPunshift also implicitly calls p_Setm(), but just for the case this changes in future.
   p_mLPunshift(m2, r);