Index: ELF/Symbols.cpp
===================================================================
--- ELF/Symbols.cpp
+++ ELF/Symbols.cpp
@@ -53,6 +53,11 @@
     if (!SC)
       return D.Value;
 
+    if (!SC->Live) {
+      warn("relocation refers to discarded section");
+      return D.Value;
+    }
+
     uintX_t Offset = D.Value;
     if (D.isSection()) {
       Offset += Addend;
Index: test/ELF/linkerscript/discard-section.s
===================================================================
--- test/ELF/linkerscript/discard-section.s
+++ test/ELF/linkerscript/discard-section.s
@@ -1,10 +1,15 @@
 # REQUIRES: x86
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
 # RUN: echo "SECTIONS { /DISCARD/ : { *(.aaa*) } }" > %t.script
-# RUN: ld.lld -o %t1 --script %t.script %t
+# RUN: ld.lld -o %t1 --script %t.script %t 2>&1 | FileCheck --check-prefix=WARN %s
 # RUN: llvm-objdump -section-headers %t1 | FileCheck %s
+
+# WARN: relocation refers to discarded section
 # CHECK-NOT: .aaa
 
 .section .aaa,"a"
 aaa:
   .quad 0
+
+.section .zzz,"a"
+  .quad aaa