diff --git a/lld/MachO/Writer.cpp b/lld/MachO/Writer.cpp
--- a/lld/MachO/Writer.cpp
+++ b/lld/MachO/Writer.cpp
@@ -672,13 +672,25 @@
     if (isec->shouldOmitFromOutput())
       continue;
 
+    bool skipNext = false;
     for (auto it = isec->relocs.begin(); it != isec->relocs.end(); ++it) {
       lld::macho::Reloc &r = *it;
+
+      // Canonicalize the referent so that later accesses in Writer won't
+      // have to worry about it. Perhaps we should do this for Defined::isec
+      // too...
+      if (auto *referentIsec = r.referent.dyn_cast<InputSection *>())
+        r.referent = referentIsec->canonical();
+
+      if (skipNext) {
+        skipNext = false;
+        continue;
+      }
       if (target->hasAttr(r.type, RelocAttrBits::SUBTRAHEND)) {
         // Skip over the following UNSIGNED relocation -- it's just there as the
         // minuend, and doesn't have the usual UNSIGNED semantics. We don't want
         // to emit rebase opcodes for it.
-        it++;
+        skipNext = true;
         continue;
       }
       if (auto *sym = r.referent.dyn_cast<Symbol *>()) {
@@ -688,11 +700,6 @@
         if (!isa<Undefined>(sym) && validateSymbolRelocation(sym, isec, r))
           prepareSymbolRelocation(sym, isec, r);
       } else {
-        // Canonicalize the referent so that later accesses in Writer won't
-        // have to worry about it. Perhaps we should do this for Defined::isec
-        // too...
-        auto *referentIsec = r.referent.get<InputSection *>();
-        r.referent = referentIsec->canonical();
         if (!r.pcrel) {
           if (config->emitChainedFixups)
             in.chainedFixups->addRebase(isec, r.offset);
diff --git a/lld/test/MachO/fold-dwarf-lsda.s b/lld/test/MachO/fold-dwarf-lsda.s
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/fold-dwarf-lsda.s
@@ -0,0 +1,69 @@
+# REQUIRES: x86
+
+## Use an old version to ensure we do *not* have any compact-unwind.                
+# RUN: llvm-mc  -filetype=obj -triple=x86_64-apple-macos %s -o %t.o
+# RUN: %lld -lSystem -lc++ --icf=all -arch x86_64 -arch x86_64 -platform_version macos 11.0 11.0 %t.o -o %t.out
+
+	.section	__TEXT,__text,regular,pure_instructions
+	.macosx_version_min 10, 4
+	.globl	_g
+	.p2align	4, 0x90
+_g:               
+	.cfi_startproc
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbp, -16
+	.cfi_def_cfa_register %rbp
+	.cfi_endproc
+   
+	.globl	_f
+	.p2align	4, 0x90
+_f:
+	.cfi_startproc
+	.cfi_personality 155, ___gxx_personality_v0
+	.cfi_lsda 16, Lexception0
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbp, -16
+	.cfi_def_cfa_register %rbp
+	callq	_g
+	retq
+	.cfi_endproc
+	
+	.section	__TEXT,__gcc_except_tab
+	.p2align	2
+GCC_except_table1:
+Lexception0:
+	.byte	255
+	.byte	155
+	.p2align	2
+                                
+	.section	__TEXT,__text,regular,pure_instructions
+	.globl	_f2             
+	.p2align	4, 0x90
+_f2:                            
+	.cfi_startproc
+	.cfi_personality 155, ___gxx_personality_v0
+	.cfi_lsda 16, Lexception1
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbp, -16
+	.cfi_def_cfa_register %rbp
+	callq	_g
+	retq
+	.cfi_endproc
+
+	
+	.section	__TEXT,__gcc_except_tab
+	.p2align	2
+GCC_except_table2:
+Lexception1:
+	.byte	255
+	.byte	155
+	.p2align	2
+                                  
+	.section	__TEXT,__text,regular,pure_instructions
+	.globl	_main             
+	.p2align	4, 0x90
+_main:                            
+	retq
+
+
+.subsections_via_symbols