fix infinite loop
diff --git a/Eigen/src/Core/products/SelfadjointProduct.h b/Eigen/src/Core/products/SelfadjointProduct.h
index 9eb5de7..35d5ded 100644
--- a/Eigen/src/Core/products/SelfadjointProduct.h
+++ b/Eigen/src/Core/products/SelfadjointProduct.h
@@ -75,7 +75,8 @@
Index nc = size; // cache block size along the N direction
computeProductBlockingSizes<Scalar,Scalar>(kc, mc, nc);
// !!! mc must be a multiple of nr:
- mc = (mc/Blocking::nr)*Blocking::nr;
+ if(mc>Blocking::nr)
+ mc = (mc/Blocking::nr)*Blocking::nr;
Scalar* blockA = ei_aligned_stack_new(Scalar, kc*mc);
std::size_t sizeB = kc*Blocking::PacketSize*Blocking::nr + kc*size;
