diff --git a/lld/COFF/DebugTypes.cpp b/lld/COFF/DebugTypes.cpp
--- a/lld/COFF/DebugTypes.cpp
+++ b/lld/COFF/DebugTypes.cpp
@@ -233,6 +233,7 @@
 // debug info will simply be missing from the final PDB - that is the default
 // accepted behavior.
 void loadTypeServerSource(llvm::MemoryBufferRef m) {
+  TypeServerSource::instances.clear();
   std::string path = normalizePdbPath(m.getBufferIdentifier());
 
   Expected<TypeServerSource *> ts = TypeServerSource::getInstance(m);
diff --git a/lld/COFF/Writer.cpp b/lld/COFF/Writer.cpp
--- a/lld/COFF/Writer.cpp
+++ b/lld/COFF/Writer.cpp
@@ -586,6 +586,7 @@
 
 // The main function of the writer.
 void Writer::run() {
+  outputSections.clear();
   ScopedTimer t1(codeLayoutTimer);
 
   createImportTables();