diff --git a/include/verilated_random.cpp b/include/verilated_random.cpp
index 7e048e6c1..30e45d64d 100644
--- a/include/verilated_random.cpp
+++ b/include/verilated_random.cpp
@@ -481,13 +481,14 @@ bool VlRandomizer::parseSolution(std::iostream& f) {
             }
             const std::string indexed_name = oss.str();
 
-            const auto it = std::find_if(m_arr_vars.begin(), m_arr_vars.end(),
-                                         [&indexed_name](const auto& entry) {
-                                             return entry.second->m_name == indexed_name;
-                                         });
-            if (it != m_arr_vars.end()) {
+            const auto iti = std::find_if(m_arr_vars.begin(), m_arr_vars.end(),
+                                          [&indexed_name](const auto& entry) {
+                                              return entry.second->m_name == indexed_name;
+                                          });
+            if (iti != m_arr_vars.end()) {
                 std::ostringstream ss;
-                ss << "#x" << std::hex << std::setw(8) << std::setfill('0') << it->second->m_index;
+                ss << "#x" << std::hex << std::setw(8) << std::setfill('0')
+                   << iti->second->m_index;
                 idx = ss.str();
             } else {
                 VL_FATAL_MT(__FILE__, __LINE__, "randomize",
diff --git a/include/verilated_vpi.cpp b/include/verilated_vpi.cpp
index ac885332d..7654146a1 100644
--- a/include/verilated_vpi.cpp
+++ b/include/verilated_vpi.cpp
@@ -2779,7 +2779,6 @@ vpiHandle vpi_put_value(vpiHandle object, p_vpi_value valuep, p_vpi_time /*time_
             }
             return object;
         } else if (valuep->format == vpiOctStrVal) {
-            const int chars = (varBits + 2) / 3;
             const int len = std::strlen(valuep->value.str);
             for (int i = 0; i < len; ++i) {
                 char digit = valuep->value.str[len - i - 1] - '0';
@@ -3127,7 +3126,6 @@ void vl_get_value_array(vpiHandle object, p_vpi_arrayvalue arrayvalue_p, PLI_INT
         arrayvalue_p->value.shortints = shortintsp;
 
         if (varp->vltype() == VLVT_UINT8) {
-            const CData* ptr = reinterpret_cast<CData*>(vop->varDatap());
             vl_get_value_array_integrals(index, num, size, varp->entBits(), leftIsLow,
                                          vop->varCDatap(), shortintsp);
         } else if (varp->vltype() == VLVT_UINT16) {
@@ -3305,8 +3303,6 @@ void vpi_get_value_array(vpiHandle object, p_vpi_arrayvalue arrayvalue_p, PLI_IN
         return;
     }
 
-    const VerilatedVar* const varp = vop->varp();
-
     int lowRange = vop->rangep()->low();
     int highRange = vop->rangep()->high();
 
diff --git a/src/V3AstNodeExpr.h b/src/V3AstNodeExpr.h
index f3e418a37..5074373aa 100644
--- a/src/V3AstNodeExpr.h
+++ b/src/V3AstNodeExpr.h
@@ -1668,7 +1668,7 @@ class AstParseHolder final : public AstNodeExpr {
     // A reference to something soon to replace, used in a select at parse time
     // that needs conversion to pull the upper lvalue later
 public:
-    AstParseHolder(FileLine* fl)
+    explicit AstParseHolder(FileLine* fl)
         : ASTGEN_SUPER_ParseHolder(fl) {}
     ASTGEN_MEMBERS_AstParseHolder;
     string emitVerilog() override { V3ERROR_NA_RETURN(""); }
@@ -4511,7 +4511,7 @@ public:
 // === AstNodeTermop ===
 class AstInferredDisable final : public AstNodeTermop {
 public:
-    AstInferredDisable(FileLine* fl)
+    explicit AstInferredDisable(FileLine* fl)
         : ASTGEN_SUPER_InferredDisable(fl) {
         dtypeSetLogicSized(1, VSigning::UNSIGNED);
     }
diff --git a/src/V3Randomize.cpp b/src/V3Randomize.cpp
index d6b8b67ef..909cfe726 100644
--- a/src/V3Randomize.cpp
+++ b/src/V3Randomize.cpp
@@ -640,12 +640,11 @@ class ConstraintExprVisitor final : public VNVisitor {
                 = new AstVarRef{varp->fileline(), classp, varp, VAccess::WRITE};
             varRefp->classOrPackagep(classOrPackagep);
             methodp->addPinsp(varRefp);
-            size_t width = varp->width();
             AstNodeDType* tmpDtypep = varp->dtypep();
             while (VN_IS(tmpDtypep, UnpackArrayDType) || VN_IS(tmpDtypep, DynArrayDType)
                    || VN_IS(tmpDtypep, QueueDType) || VN_IS(tmpDtypep, AssocArrayDType))
                 tmpDtypep = tmpDtypep->subDTypep();
-            width = tmpDtypep->width();
+            const size_t width = tmpDtypep->width();
             methodp->addPinsp(
                 new AstConst{varp->dtypep()->fileline(), AstConst::Unsized64{}, width});
             AstNodeExpr* const varnamep