diff --git a/lld/lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp b/lld/lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp
--- a/lld/lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachONormalizedFileYAML.cpp
@@ -740,9 +740,7 @@
     io.mapOptional("exports",          file.exportInfo);
     io.mapOptional("dataInCode",       file.dataInCode);
   }
-  static StringRef validate(IO &io, NormalizedFile &file) {
-    return StringRef();
-  }
+  static std::string validate(IO &io, NormalizedFile &file) { return {}; }
 };
 
 } // namespace llvm
diff --git a/llvm/include/llvm/ObjectYAML/DWARFYAML.h b/llvm/include/llvm/ObjectYAML/DWARFYAML.h
--- a/llvm/include/llvm/ObjectYAML/DWARFYAML.h
+++ b/llvm/include/llvm/ObjectYAML/DWARFYAML.h
@@ -359,8 +359,8 @@
 template <typename EntryType>
 struct MappingTraits<DWARFYAML::ListEntries<EntryType>> {
   static void mapping(IO &IO, DWARFYAML::ListEntries<EntryType> &ListEntries);
-  static StringRef validate(IO &IO,
-                            DWARFYAML::ListEntries<EntryType> &ListEntries);
+  static std::string validate(IO &IO,
+                              DWARFYAML::ListEntries<EntryType> &ListEntries);
 };
 
 template <> struct MappingTraits<DWARFYAML::RnglistEntry> {
diff --git a/llvm/include/llvm/ObjectYAML/ELFYAML.h b/llvm/include/llvm/ObjectYAML/ELFYAML.h
--- a/llvm/include/llvm/ObjectYAML/ELFYAML.h
+++ b/llvm/include/llvm/ObjectYAML/ELFYAML.h
@@ -193,6 +193,12 @@
 
   static bool classof(const Chunk *S) { return S->Kind != ChunkKind::Fill; }
 
+  // Some derived sections might have own special entries. This method returns
+  // vector of <entry name, is used> pairs. It is used for sections validation.
+  virtual std::vector<std::pair<StringRef, bool>> getEntries() const {
+    return {};
+  };
+
   // The following members are used to override section fields which is
   // useful for creating invalid objects.
 
@@ -235,6 +241,10 @@
 
   StackSizesSection() : Section(ChunkKind::StackSizes) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::StackSizes;
   }
@@ -249,6 +259,10 @@
 
   DynamicSection() : Section(ChunkKind::Dynamic) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Dynamic; }
 };
 
@@ -276,6 +290,10 @@
 
   NoteSection() : Section(ChunkKind::Note) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Notes", !!Notes}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Note; }
 };
 
@@ -283,6 +301,10 @@
   Optional<std::vector<uint32_t>> Bucket;
   Optional<std::vector<uint32_t>> Chain;
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Bucket", !!Bucket}, {"Chain", !!Chain}};
+  };
+
   // The following members are used to override section fields.
   // This is useful for creating invalid objects.
   Optional<llvm::yaml::Hex64> NBucket;
@@ -321,6 +343,13 @@
 
   GnuHashSection() : Section(ChunkKind::GnuHash) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Header", !!Header},
+            {"BloomFilter", !!BloomFilter},
+            {"HashBuckets", !!HashBuckets},
+            {"HashValues", !!HashValues}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::GnuHash; }
 };
 
@@ -343,6 +372,10 @@
 
   VerneedSection() : Section(ChunkKind::Verneed) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Dependencies", !!VerneedV}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::Verneed;
   }
@@ -353,6 +386,10 @@
 
   AddrsigSection() : Section(ChunkKind::Addrsig) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Symbols", !!Symbols}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Addrsig; }
 };
 
@@ -366,6 +403,10 @@
 
   LinkerOptionsSection() : Section(ChunkKind::LinkerOptions) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Options", !!Options}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::LinkerOptions;
   }
@@ -376,6 +417,10 @@
 
   DependentLibrariesSection() : Section(ChunkKind::DependentLibraries) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Libraries", !!Libs}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::DependentLibraries;
   }
@@ -396,6 +441,10 @@
 
   CallGraphProfileSection() : Section(ChunkKind::CallGraphProfile) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::CallGraphProfile;
   }
@@ -406,6 +455,10 @@
 
   SymverSection() : Section(ChunkKind::Symver) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Symver; }
 };
 
@@ -424,6 +477,10 @@
 
   VerdefSection() : Section(ChunkKind::Verdef) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Verdef; }
 };
 
@@ -435,6 +492,10 @@
 
   GroupSection() : Section(ChunkKind::Group) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Members", !!Members}};
+  };
+
   static bool classof(const Chunk *S) { return S->Kind == ChunkKind::Group; }
 };
 
@@ -451,6 +512,10 @@
 
   RelocationSection() : Section(ChunkKind::Relocation) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Relocations", !!Relocations}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::Relocation;
   }
@@ -461,6 +526,10 @@
 
   RelrSection() : Section(ChunkKind::Relr) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::Relr;
   }
@@ -471,6 +540,10 @@
 
   SymtabShndxSection() : Section(ChunkKind::SymtabShndxSection) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::SymtabShndxSection;
   }
@@ -486,6 +559,10 @@
 
   ARMIndexTableSection() : Section(ChunkKind::ARMIndexTable) {}
 
+  std::vector<std::pair<StringRef, bool>> getEntries() const override {
+    return {{"Entries", !!Entries}};
+  };
+
   static bool classof(const Chunk *S) {
     return S->Kind == ChunkKind::ARMIndexTable;
   }
@@ -699,7 +776,7 @@
 
 template <> struct MappingTraits<ELFYAML::SectionHeaderTable> {
   static void mapping(IO &IO, ELFYAML::SectionHeaderTable &SecHdrTable);
-  static StringRef validate(IO &IO, ELFYAML::SectionHeaderTable &SecHdrTable);
+  static std::string validate(IO &IO, ELFYAML::SectionHeaderTable &SecHdrTable);
 };
 
 template <> struct MappingTraits<ELFYAML::SectionHeader> {
@@ -713,7 +790,7 @@
 template <>
 struct MappingTraits<ELFYAML::Symbol> {
   static void mapping(IO &IO, ELFYAML::Symbol &Symbol);
-  static StringRef validate(IO &IO, ELFYAML::Symbol &Symbol);
+  static std::string validate(IO &IO, ELFYAML::Symbol &Symbol);
 };
 
 template <> struct MappingTraits<ELFYAML::StackSizeEntry> {
@@ -762,7 +839,7 @@
 
 template <> struct MappingTraits<std::unique_ptr<ELFYAML::Chunk>> {
   static void mapping(IO &IO, std::unique_ptr<ELFYAML::Chunk> &C);
-  static StringRef validate(IO &io, std::unique_ptr<ELFYAML::Chunk> &C);
+  static std::string validate(IO &io, std::unique_ptr<ELFYAML::Chunk> &C);
 };
 
 template <>
diff --git a/llvm/include/llvm/ObjectYAML/MachOYAML.h b/llvm/include/llvm/ObjectYAML/MachOYAML.h
--- a/llvm/include/llvm/ObjectYAML/MachOYAML.h
+++ b/llvm/include/llvm/ObjectYAML/MachOYAML.h
@@ -220,7 +220,7 @@
 
 template <> struct MappingTraits<MachOYAML::Section> {
   static void mapping(IO &IO, MachOYAML::Section &Section);
-  static StringRef validate(IO &io, MachOYAML::Section &Section);
+  static std::string validate(IO &io, MachOYAML::Section &Section);
 };
 
 template <> struct MappingTraits<MachOYAML::NListEntry> {
diff --git a/llvm/include/llvm/ObjectYAML/MinidumpYAML.h b/llvm/include/llvm/ObjectYAML/MinidumpYAML.h
--- a/llvm/include/llvm/ObjectYAML/MinidumpYAML.h
+++ b/llvm/include/llvm/ObjectYAML/MinidumpYAML.h
@@ -236,7 +236,7 @@
 
 template <> struct MappingTraits<std::unique_ptr<MinidumpYAML::Stream>> {
   static void mapping(IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S);
-  static StringRef validate(IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S);
+  static std::string validate(IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S);
 };
 
 template <> struct MappingContextTraits<minidump::MemoryDescriptor, BinaryRef> {
diff --git a/llvm/include/llvm/Support/YAMLTraits.h b/llvm/include/llvm/Support/YAMLTraits.h
--- a/llvm/include/llvm/Support/YAMLTraits.h
+++ b/llvm/include/llvm/Support/YAMLTraits.h
@@ -61,7 +61,7 @@
   // Must provide:
   // static void mapping(IO &io, T &fields);
   // Optionally may provide:
-  // static StringRef validate(IO &io, T &fields);
+  // static std::string validate(IO &io, T &fields);
   //
   // The optional flow flag will cause generated YAML to use a flow mapping
   // (e.g. { a: 0, b: 1 }):
@@ -83,7 +83,7 @@
   // Must provide:
   // static void mapping(IO &io, T &fields, Context &Ctx);
   // Optionally may provide:
-  // static StringRef validate(IO &io, T &fields, Context &Ctx);
+  // static std::string validate(IO &io, T &fields, Context &Ctx);
   //
   // The optional flow flag will cause generated YAML to use a flow mapping
   // (e.g. { a: 0, b: 1 }):
@@ -421,7 +421,7 @@
 
 // Test if MappingContextTraits<T>::validate() is defined on type T.
 template <class T, class Context> struct has_MappingValidateTraits {
-  using Signature_validate = StringRef (*)(class IO &, T &, Context &);
+  using Signature_validate = std::string (*)(class IO &, T &, Context &);
 
   template <typename U>
   static char test(SameType<Signature_validate, &U::validate>*);
@@ -435,7 +435,7 @@
 
 // Test if MappingTraits<T>::validate() is defined on type T.
 template <class T> struct has_MappingValidateTraits<T, EmptyContext> {
-  using Signature_validate = StringRef (*)(class IO &, T &);
+  using Signature_validate = std::string (*)(class IO &, T &);
 
   template <typename U>
   static char test(SameType<Signature_validate, &U::validate> *);
@@ -1041,7 +1041,7 @@
   else
     io.beginMapping();
   if (io.outputting()) {
-    StringRef Err = MappingTraits<T>::validate(io, Val);
+    std::string Err = MappingTraits<T>::validate(io, Val);
     if (!Err.empty()) {
       errs() << Err << "\n";
       assert(Err.empty() && "invalid struct trying to be written as yaml");
@@ -1049,7 +1049,7 @@
   }
   detail::doMapping(io, Val, Ctx);
   if (!io.outputting()) {
-    StringRef Err = MappingTraits<T>::validate(io, Val);
+    std::string Err = MappingTraits<T>::validate(io, Val);
     if (!Err.empty())
       io.setError(Err);
   }
diff --git a/llvm/lib/ObjectYAML/DWARFYAML.cpp b/llvm/lib/ObjectYAML/DWARFYAML.cpp
--- a/llvm/lib/ObjectYAML/DWARFYAML.cpp
+++ b/llvm/lib/ObjectYAML/DWARFYAML.cpp
@@ -304,11 +304,11 @@
 }
 
 template <typename EntryType>
-StringRef MappingTraits<DWARFYAML::ListEntries<EntryType>>::validate(
+std::string MappingTraits<DWARFYAML::ListEntries<EntryType>>::validate(
     IO &IO, DWARFYAML::ListEntries<EntryType> &ListEntries) {
   if (ListEntries.Entries && ListEntries.Content)
     return "Entries and Content can't be used together";
-  return StringRef();
+  return "";
 }
 
 template <typename EntryType>
diff --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -864,14 +864,14 @@
   IO.mapOptional("NoHeaders", SectionHeader.NoHeaders);
 }
 
-StringRef MappingTraits<ELFYAML::SectionHeaderTable>::validate(
+std::string MappingTraits<ELFYAML::SectionHeaderTable>::validate(
     IO &IO, ELFYAML::SectionHeaderTable &SecHdrTable) {
   if (SecHdrTable.NoHeaders && (SecHdrTable.Sections || SecHdrTable.Excluded))
     return "NoHeaders can't be used together with Sections/Excluded";
   if (!SecHdrTable.NoHeaders && !SecHdrTable.Sections && !SecHdrTable.Excluded)
     return "SectionHeaderTable can't be empty. Use 'NoHeaders' key to drop the "
            "section header table";
-  return StringRef();
+  return {};
 }
 
 void MappingTraits<ELFYAML::FileHeader>::mapping(IO &IO,
@@ -1089,11 +1089,11 @@
   IO.mapOptional("Other", Keys->Other);
 }
 
-StringRef MappingTraits<ELFYAML::Symbol>::validate(IO &IO,
-                                                   ELFYAML::Symbol &Symbol) {
+std::string MappingTraits<ELFYAML::Symbol>::validate(IO &IO,
+                                                     ELFYAML::Symbol &Symbol) {
   if (Symbol.Index && Symbol.Section.data())
     return "Index and Section cannot both be specified for Symbol";
-  return StringRef();
+  return {};
 }
 
 static void commonSectionMapping(IO &IO, ELFYAML::Section &Section) {
@@ -1422,7 +1422,7 @@
   }
 }
 
-StringRef MappingTraits<std::unique_ptr<ELFYAML::Chunk>>::validate(
+std::string MappingTraits<std::unique_ptr<ELFYAML::Chunk>>::validate(
     IO &io, std::unique_ptr<ELFYAML::Chunk> &C) {
   if (const auto *F = dyn_cast<ELFYAML::Fill>(C.get())) {
     if (F->Pattern && F->Pattern->binary_size() != 0 && !F->Size)
@@ -1435,117 +1435,36 @@
       (uint64_t)(*Sec.Size) < Sec.Content->binary_size())
     return "Section size must be greater than or equal to the content size";
 
-  if (const auto *RawSection = dyn_cast<ELFYAML::RawContentSection>(C.get())) {
-    if (RawSection->Flags && RawSection->ShFlags)
-      return "ShFlags and Flags cannot be used together";
-    return {};
-  }
-
-  if (const auto *SS = dyn_cast<ELFYAML::StackSizesSection>(C.get())) {
-    if ((SS->Content || SS->Size) && SS->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *HS = dyn_cast<ELFYAML::HashSection>(C.get())) {
-    if ((HS->Content || HS->Size) && (HS->Bucket || HS->Chain))
-      return "\"Bucket\" and \"Chain\" cannot be used with \"Content\" or "
-             "\"Size\"";
-    if ((HS->Bucket && !HS->Chain) || (!HS->Bucket && HS->Chain))
-      return "\"Bucket\" and \"Chain\" must be used together";
-    return {};
-  }
-
-  if (const auto *Sec = dyn_cast<ELFYAML::AddrsigSection>(C.get())) {
-    if ((Sec->Content || Sec->Size) && Sec->Symbols)
-      return "\"Symbols\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *NS = dyn_cast<ELFYAML::NoteSection>(C.get())) {
-    if ((NS->Content || NS->Size) && NS->Notes)
-      return "\"Notes\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *Sec = dyn_cast<ELFYAML::GnuHashSection>(C.get())) {
-    const bool HasSpecialFields =
-        Sec->Header || Sec->BloomFilter || Sec->HashBuckets || Sec->HashValues;
-    if (HasSpecialFields && (Sec->Content || Sec->Size))
-      return "\"Header\", \"BloomFilter\", "
-             "\"HashBuckets\" and \"HashValues\" can't be used together with "
-             "\"Content\" or \"Size\"";
-
-    if (HasSpecialFields && (!Sec->Header || !Sec->BloomFilter ||
-                             !Sec->HashBuckets || !Sec->HashValues))
-      return "\"Header\", \"BloomFilter\", "
-             "\"HashBuckets\" and \"HashValues\" must be used together";
-    return {};
-  }
-
-  if (const auto *Sec = dyn_cast<ELFYAML::LinkerOptionsSection>(C.get())) {
-    if ((Sec->Content || Sec->Size) && Sec->Options)
-      return "\"Options\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *Sec = dyn_cast<ELFYAML::DependentLibrariesSection>(C.get())) {
-    if ((Sec->Content || Sec->Size) && Sec->Libs)
-      return "\"Libraries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *VD = dyn_cast<ELFYAML::VerdefSection>(C.get())) {
-    if ((VD->Content || VD->Size) && VD->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *VN = dyn_cast<ELFYAML::VerneedSection>(C.get())) {
-    if ((VN->Content || VN->Size) && VN->VerneedV)
-      return "\"Dependencies\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *SV = dyn_cast<ELFYAML::SymverSection>(C.get())) {
-    if ((SV->Content || SV->Size) && SV->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *RS = dyn_cast<ELFYAML::RelrSection>(C.get())) {
-    if ((RS->Content || RS->Size) && RS->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
-  if (const auto *CGP = dyn_cast<ELFYAML::CallGraphProfileSection>(C.get())) {
-    if ((CGP->Content || CGP->Size) && CGP->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
+  auto BuildErrPrefix = [](ArrayRef<std::pair<StringRef, bool>> EntV) {
+    std::string Msg;
+    for (size_t I = 0; I < EntV.size(); ++I) {
+      StringRef Name = EntV[I].first;
+      if (I == 0) {
+        Msg = "\"" + Name.str() + "\"";
+        continue;
+      }
+      if (I != EntV.size() - 1)
+        Msg += ", \"" + Name.str() + "\"";
+      else
+        Msg += " and \"" + Name.str() + "\"";
+    }
+    return Msg;
+  };
 
-  if (const auto *IT = dyn_cast<ELFYAML::ARMIndexTableSection>(C.get())) {
-    if ((IT->Content || IT->Size) && IT->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
+  std::vector<std::pair<StringRef, bool>> Entries = Sec.getEntries();
+  const size_t NumUsedEntries = llvm::count_if(
+      Entries, [](const std::pair<StringRef, bool> &P) { return P.second; });
 
-  if (const auto *RS = dyn_cast<ELFYAML::RelocationSection>(C.get())) {
-    if ((RS->Content || RS->Size) && RS->Relocations)
-      return "\"Relocations\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
+  if ((Sec.Size || Sec.Content) && NumUsedEntries > 0)
+    return BuildErrPrefix(Entries) +
+           " cannot be used with \"Content\" or \"Size\"";
 
-  if (const auto *SS = dyn_cast<ELFYAML::SymtabShndxSection>(C.get())) {
-    if ((SS->Content || SS->Size) && SS->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
+  if (NumUsedEntries > 0 && Entries.size() != NumUsedEntries)
+    return BuildErrPrefix(Entries) + " must be used together";
 
-  if (const auto *GS = dyn_cast<ELFYAML::GroupSection>(C.get())) {
-    if ((GS->Content || GS->Size) && GS->Members)
-      return "\"Members\" cannot be used with \"Content\" or \"Size\"";
+  if (const auto *RawSection = dyn_cast<ELFYAML::RawContentSection>(C.get())) {
+    if (RawSection->Flags && RawSection->ShFlags)
+      return "ShFlags and Flags cannot be used together";
     return {};
   }
 
@@ -1555,12 +1474,6 @@
     return {};
   }
 
-  if (const auto *DS = dyn_cast<ELFYAML::DynamicSection>(C.get())) {
-    if ((DS->Content || DS->Size) && DS->Entries)
-      return "\"Entries\" cannot be used with \"Content\" or \"Size\"";
-    return {};
-  }
-
   if (const auto *MF = dyn_cast<ELFYAML::MipsABIFlags>(C.get())) {
     if (MF->Content)
       return "\"Content\" key is not implemented for SHT_MIPS_ABIFLAGS "
diff --git a/llvm/lib/ObjectYAML/MachOYAML.cpp b/llvm/lib/ObjectYAML/MachOYAML.cpp
--- a/llvm/lib/ObjectYAML/MachOYAML.cpp
+++ b/llvm/lib/ObjectYAML/MachOYAML.cpp
@@ -305,7 +305,7 @@
   IO.mapOptional("relocations", Section.relocations);
 }
 
-StringRef
+std::string
 MappingTraits<MachOYAML::Section>::validate(IO &IO,
                                             MachOYAML::Section &Section) {
   if (Section.content && Section.size < Section.content->binary_size())
diff --git a/llvm/lib/ObjectYAML/MinidumpYAML.cpp b/llvm/lib/ObjectYAML/MinidumpYAML.cpp
--- a/llvm/lib/ObjectYAML/MinidumpYAML.cpp
+++ b/llvm/lib/ObjectYAML/MinidumpYAML.cpp
@@ -292,7 +292,7 @@
   IO.mapOptional("Size", Stream.Size, Stream.Content.binary_size());
 }
 
-static StringRef streamValidate(RawContentStream &Stream) {
+static std::string streamValidate(RawContentStream &Stream) {
   if (Stream.Size.value < Stream.Content.binary_size())
     return "Stream size must be greater or equal to the content size";
   return "";
@@ -434,7 +434,7 @@
   }
 }
 
-StringRef yaml::MappingTraits<std::unique_ptr<Stream>>::validate(
+std::string yaml::MappingTraits<std::unique_ptr<Stream>>::validate(
     yaml::IO &IO, std::unique_ptr<MinidumpYAML::Stream> &S) {
   switch (S->Kind) {
   case MinidumpYAML::Stream::StreamKind::RawContent:
diff --git a/llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml b/llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml
--- a/llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml
+++ b/llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml
@@ -231,7 +231,7 @@
 
 # RUN: not yaml2obj --docnum=11 -DCONTENT="" %s 2>&1 | FileCheck %s --check-prefix=TOGETHER
 # RUN: not yaml2obj --docnum=11 -DSIZE=0 %s 2>&1 | FileCheck %s --check-prefix=TOGETHER
-# TOGETHER: error: "Header", "BloomFilter", "HashBuckets" and "HashValues" can't be used together with "Content" or "Size"
+# TOGETHER: error: "Header", "BloomFilter", "HashBuckets" and "HashValues" cannot be used with "Content" or "Size"
 
 --- !ELF
 FileHeader:
diff --git a/llvm/unittests/Support/YAMLIOTest.cpp b/llvm/unittests/Support/YAMLIOTest.cpp
--- a/llvm/unittests/Support/YAMLIOTest.cpp
+++ b/llvm/unittests/Support/YAMLIOTest.cpp
@@ -1782,10 +1782,10 @@
     static void mapping(IO &io, MyValidation &d) {
         io.mapRequired("value", d.value);
     }
-    static StringRef validate(IO &io, MyValidation &d) {
+    static std::string validate(IO &io, MyValidation &d) {
         if (d.value < 0)
           return "negative value";
-        return StringRef();
+        return {};
     }
   };
  }