diff --git a/lld/MachO/Symbols.h b/lld/MachO/Symbols.h
--- a/lld/MachO/Symbols.h
+++ b/lld/MachO/Symbols.h
@@ -58,14 +58,14 @@
 
   virtual uint64_t getVA() const { return 0; }
 
-  virtual bool isWeakDef() const { llvm_unreachable("cannot be weak def"); }
+  virtual bool isWeakDef() const { return false; }
 
   // Only undefined or dylib symbols can be weak references. A weak reference
   // need not be satisfied at runtime, e.g. due to the symbol not being
   // available on a given target platform.
   virtual bool isWeakRef() const { return false; }
 
-  virtual bool isTlv() const { llvm_unreachable("cannot be TLV"); }
+  virtual bool isTlv() const { return false; }
 
   // Whether this symbol is in the GOT or TLVPointer sections.
   bool isInGot() const { return gotIndex != UINT32_MAX; }