diff --git a/src/base/SolutionArray.cpp b/src/base/SolutionArray.cpp
index 33ab606532..296d4ba2e3 100644
--- a/src/base/SolutionArray.cpp
+++ b/src/base/SolutionArray.cpp
@@ -240,7 +240,8 @@ void SolutionArray::writeEntry(const std::string& fname, const std::string& id,
             std::vector<vector_fp> prop;
             for (size_t i = 0; i < m_size; i++) {
                 size_t first = offset + i * m_stride;
-                prop.push_back(vector_fp(&m_data[first], &m_data[first + nSpecies]));
+                prop.emplace_back(m_data.begin() + first,
+                                  m_data.begin() + first + nSpecies);
             }
             file.writeMatrix(id, name, prop);
         } else {
diff --git a/src/equil/MultiPhase.cpp b/src/equil/MultiPhase.cpp
index 5c7653ee6b..87c51ba3fa 100644
--- a/src/equil/MultiPhase.cpp
+++ b/src/equil/MultiPhase.cpp
@@ -818,7 +818,7 @@ void MultiPhase::uploadMoleFractionsFromPhases()
     size_t loc = 0;
     for (size_t ip = 0; ip < nPhases(); ip++) {
         ThermoPhase* p = m_phase[ip];
-        p->getMoleFractions(&m_moleFractions[loc]);
+        p->getMoleFractions(m_moleFractions.data() + loc);
         loc += p->nSpecies();
     }
     calcElemAbundances();
@@ -828,7 +828,7 @@ void MultiPhase::updatePhases() const
 {
     size_t loc = 0;
     for (size_t p = 0; p < nPhases(); p++) {
-        m_phase[p]->setState_TPX(m_temp, m_press, &m_moleFractions[loc]);
+        m_phase[p]->setState_TPX(m_temp, m_press, m_moleFractions.data() + loc);
         loc += m_phase[p]->nSpecies();
         m_temp_OK[p] = true;
         if (m_temp < m_phase[p]->minTemp() || m_temp > m_phase[p]->maxTemp()) {
diff --git a/src/oneD/Sim1D.cpp b/src/oneD/Sim1D.cpp
index 90f9773210..09149b8b7b 100644
--- a/src/oneD/Sim1D.cpp
+++ b/src/oneD/Sim1D.cpp
@@ -221,8 +221,10 @@ AnyMap legacyH5(shared_ptr<SolutionArray> arr, const AnyMap& header={})
         while (profile[ix] <= temp && ix < arr->size()) {
             ix++;
         }
-        out["fixed-point"]["location"] = arr->getComponent("grid")[ix - 1];
-        out["fixed-point"]["temperature"] = temp;
+        if (ix != 0) {
+            out["fixed-point"]["location"] = arr->getComponent("grid")[ix - 1];
+            out["fixed-point"]["temperature"] = temp;
+        }
     }
 
     return out;
@@ -558,7 +560,9 @@ int Sim1D::refine(int loglevel)
     for (size_t n = 0; n < nDomains(); n++) {
         Domain1D& d = domain(n);
         gridsize = dsize[n];
-        d.setupGrid(gridsize, &znew[gridstart]);
+        if (gridsize != 0) {
+            d.setupGrid(gridsize, &znew[gridstart]);
+        }
         gridstart += gridsize;
     }
 
diff --git a/src/transport/IonGasTransport.cpp b/src/transport/IonGasTransport.cpp
index f628d689e8..d6d352710d 100644
--- a/src/transport/IonGasTransport.cpp
+++ b/src/transport/IonGasTransport.cpp
@@ -36,9 +36,9 @@ void IonGasTransport::init(ThermoPhase* thermo, int mode, int log_level)
     // Find the index of electron
     size_t nElectronSpecies = 0;
     for (size_t k = 0; k < m_nsp; k++) {
-        if (m_thermo->molecularWeight(k) ==
-            m_thermo->atomicWeight(m_thermo->elementIndex("E")) &&
-            m_thermo->charge(k)  == -1) {
+        if (m_thermo->molecularWeight(k) == getElementWeight("E") &&
+            m_thermo->charge(k) == -1)
+        {
             m_kElectron = k;
             nElectronSpecies++;
         }
diff --git a/test/kinetics/kineticsFromYaml.cpp b/test/kinetics/kineticsFromYaml.cpp
index 035396f10b..5286a119b5 100644
--- a/test/kinetics/kineticsFromYaml.cpp
+++ b/test/kinetics/kineticsFromYaml.cpp
@@ -316,11 +316,11 @@ TEST(Reaction, FalloffFromYaml2)
     EXPECT_DOUBLE_EQ(rate->highRate().preExponentialFactor(), 6e11);
     EXPECT_DOUBLE_EQ(rate->lowRate().preExponentialFactor(), 1.04e20);
     EXPECT_DOUBLE_EQ(rate->lowRate().activationEnergy(), 1600);
-    vector_fp params(4);
+    vector_fp params;
     rate->getFalloffCoeffs(params);
+    ASSERT_EQ(params.size(), (size_t) 3);
     EXPECT_DOUBLE_EQ(params[0], 0.562);
     EXPECT_DOUBLE_EQ(params[1], 91.0);
-    EXPECT_DOUBLE_EQ(params[3], 0.0);
     EXPECT_EQ(R->input["source"].asString(), "somewhere");
 }