Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -307,7 +307,19 @@
   // you can call lld::elf::main more than once as a library.
   memset(&Out::First, 0, sizeof(Out));
 
-  auto Add = [](InputSectionBase *Sec) { InputSections.push_back(Sec); };
+  auto Add = [](InputSectionBase *Sec) {
+    // We assume all synthetic sections are placed to the end,
+    // after regular ones. Do not mix them. We allow merge sections
+    // because them are converted to synthetic mergeable sections later.
+    if (!InputSections.empty()) {
+      auto IsOk = [](InputSectionBase::Kind K) {
+        return K == InputSectionBase::Synthetic || K == InputSectionBase::Merge;
+      };
+      if (IsOk(InputSections.back()->kind()))
+        assert(IsOk(Sec->kind()));
+    }
+    InputSections.push_back(Sec);
+  };
 
   // Create singleton output sections.
   Out::Bss = make<OutputSection>(".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
@@ -324,6 +336,12 @@
   Out::ProgramHeaders = make<OutputSection>("", 0, SHF_ALLOC);
   Out::ProgramHeaders->updateAlignment(sizeof(uintX_t));
 
+  InputSection *Common = createCommonSection<ELFT>();
+  if (!Common->Data.empty()) {
+    In<ELFT>::Common = Common;
+    Add(Common);
+  }
+
   if (needsInterpSection<ELFT>()) {
     In<ELFT>::Interp = createInterpSection();
     Add(In<ELFT>::Interp);
@@ -344,12 +362,6 @@
     Add(In<ELFT>::BuildId);
   }
 
-  InputSection *Common = createCommonSection<ELFT>();
-  if (!Common->Data.empty()) {
-    In<ELFT>::Common = Common;
-    Add(Common);
-  }
-
   // Add MIPS-specific sections.
   bool HasDynSymTab =
       !Symtab<ELFT>::X->getSharedFiles().empty() || Config->pic() ||