make sure class pointers are initialized to NULL and virial accumulator.

src/angle.cpp

@@ -29,6 +29,7 @@ using namespace MathConst;
 Angle::Angle(LAMMPS *lmp) : Pointers(lmp)
 {
   energy = 0.0;
+  virial[0] = virial[1] = virial[2] = virial[3] = virial[4] = virial[5] = 0.0;
   writedata = 1;
 
   allocated = 0;

src/angle_hybrid.cpp

@@ -33,6 +33,9 @@ AngleHybrid::AngleHybrid(LAMMPS *lmp) : Angle(lmp)
 {
   writedata = 0;
   nstyles = 0;
+  nanglelist = nullptr;
+  maxangle = nullptr;
+  anglelist = nullptr;
 }
 
 /* ---------------------------------------------------------------------- */

src/bond.cpp

@@ -39,6 +39,7 @@ enum{NONE,LINEAR,SPLINE};
 Bond::Bond(LAMMPS *lmp) : Pointers(lmp)
 {
   energy = 0.0;
+  virial[0] = virial[1] = virial[2] = virial[3] = virial[4] = virial[5] = 0.0;
   writedata = 1;
 
   allocated = 0;

src/bond_hybrid.cpp

@@ -34,6 +34,9 @@ BondHybrid::BondHybrid(LAMMPS *lmp) : Bond(lmp)
   writedata = 0;
   nstyles = 0;
   has_quartic = -1;
+  nbondlist = nullptr;
+  maxbond = nullptr;
+  bondlist = nullptr;
 }
 
 /* ---------------------------------------------------------------------- */