Index: cppcoreguidelines/ProTypeMemberInitCheck.cpp
===================================================================
--- cppcoreguidelines/ProTypeMemberInitCheck.cpp
+++ cppcoreguidelines/ProTypeMemberInitCheck.cpp
@@ -179,6 +179,11 @@
   const auto *Ctor = Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");
   const auto &MemberFields = Ctor->getParent()->fields();
 
+  // Skip delayed template instantiation declarations.
+  const auto *Body = Ctor->getBody();
+  if (!Body)
+    return;
+
   SmallPtrSet<const FieldDecl *, 16> FieldsToInit;
   fieldsRequiringInit(MemberFields, FieldsToInit);
   if (FieldsToInit.empty())
@@ -193,7 +198,7 @@
       continue;
     FieldsToInit.erase(Init->getMember());
   }
-  removeFieldsInitializedInBody(*Ctor->getBody(), *Result.Context,
+  removeFieldsInitializedInBody(*Body, *Result.Context,
                                 FieldsToInit);
   if (FieldsToInit.empty())
     return;
Index: modernize/RedundantVoidArgCheck.cpp
===================================================================
--- modernize/RedundantVoidArgCheck.cpp
+++ modernize/RedundantVoidArgCheck.cpp
@@ -105,8 +105,9 @@
   SourceLocation Start = Function->getLocStart();
   if (Function->isThisDeclarationADefinition()) {
     SourceLocation End;
-    if (Function->hasBody())
-      End = Function->getBody()->getLocStart().getLocWithOffset(-1);
+    const auto *Body = Function->getBody();
+    if (Body)
+      End = Body->getLocStart().getLocWithOffset(-1);
     else
       End = Function->getLocEnd();
     removeVoidArgumentTokens(Result, SourceRange(Start, End),