Index: COFF/Driver.cpp
===================================================================
--- COFF/Driver.cpp
+++ COFF/Driver.cpp
@@ -315,6 +315,8 @@
   bool Seen = !VisitedFiles.insert(Path.lower()).second;
   if (Seen)
     return None;
+  if (Path.endswith_lower(".lib"))
+    VisitedLibs.insert(sys::path::filename(Path));
   return Path;
 }
 
Index: test/COFF/libpath.test
===================================================================
--- test/COFF/libpath.test
+++ test/COFF/libpath.test
@@ -16,3 +16,11 @@
 # RUN: FileCheck -check-prefix=CHECK2 %s < %t.log
 
 CHECK2: a{{[/\\]}}std64.lib
+
+# RUN: lld-link /out:%t.exe /entry:main /verbose \
+# RUN:   %t/a/std64.lib /subsystem:console %p/Inputs/hello64.obj \
+# RUN:   /libpath:%t/b /verbose > %t.log 2>&1
+# RUN: FileCheck -check-prefix=CHECK3 %s < %t.log
+
+CHECK3:     Reading {{.*}}a/std64.lib
+CHECK3-NOT: Reading {{.*}}b/std64.lib