Fix misc memory leaks

src/V3Assert.cpp

@@ -368,6 +368,7 @@ private:
             inp = new AstVarRef{nodep->fileline(), invarp, VAccess::READ};
         }
         nodep->replaceWith(inp);
+        VL_DO_DANGLING(pushDeletep(nodep), nodep);
     }
 
     //========== Move $sampled down to read-only variables

src/V3ParseGrammar.cpp

@@ -138,13 +138,16 @@ AstNodeDType* V3ParseGrammar::createArray(AstNodeDType* basep, AstNodeRange* nra
                                                  rangep};
             } else if (VN_IS(nrangep, UnsizedRange)) {
                 arrayp = new AstUnsizedArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp};
+                VL_DO_DANGLING(nrangep->deleteTree(), nrangep);
             } else if (VN_IS(nrangep, BracketRange)) {
                 const AstBracketRange* const arangep = VN_AS(nrangep, BracketRange);
                 AstNode* const keyp = arangep->elementsp()->unlinkFrBack();
                 arrayp = new AstBracketArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp,
                                                   keyp};
+                VL_DO_DANGLING(nrangep->deleteTree(), nrangep);
             } else if (VN_IS(nrangep, WildcardRange)) {
                 arrayp = new AstWildcardArrayDType{nrangep->fileline(), VFlagChildDType{}, arrayp};
+                VL_DO_DANGLING(nrangep->deleteTree(), nrangep);
             } else {
                 UASSERT_OBJ(0, nrangep, "Expected range or unsized range");
             }

src/verilog.y

@@ -2105,7 +2105,8 @@ struct_union_member<memberDTypep>:     // ==IEEE: struct_union_member
         //                      // UNSUP random_qualifer not propagagted until have randomize support
                 random_qualifierE data_type_or_void
         /*mid*/         { GRAMMARP->m_memDTypep = $2; }  // As a list follows, need to attach this dtype to each member.
-        /*cont*/    list_of_member_decl_assignments ';'         { $$ = $4; GRAMMARP->m_memDTypep = nullptr; }
+        /*cont*/    list_of_member_decl_assignments ';'
+                        { $$ = $4; DEL(GRAMMARP->m_memDTypep); GRAMMARP->m_memDTypep = nullptr; }
         |       vlTag                                   { $$ = nullptr; }
         ;