diff --git a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
index 9d5e0f886a4a..3950454b7c90 100644
--- a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
+++ b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
@@ -6649,7 +6649,6 @@ CreateAllImageInfosPayload(const lldb::ProcessSP &process_sp,
 
   offset_t current_string_offset = start_of_filenames;
   offset_t current_segaddrs_offset = start_of_seg_vmaddrs;
-  std::vector<struct image_entry> image_entries;
   for (size_t i = 0; i < modules_count; i++) {
     ModuleSP module_sp = modules.GetModuleAtIndex(i);
 
diff --git a/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp b/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
index 39584bad2d74..6037c8d2514b 100644
--- a/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
+++ b/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
@@ -658,7 +658,6 @@ bool ProcessMachCore::DoUpdateThreadList(ThreadList &old_thread_list,
     ObjectFile *core_objfile = m_core_module_sp->GetObjectFile();
 
     if (core_objfile) {
-      std::set<lldb::tid_t> used_tids;
       const uint32_t num_threads = core_objfile->GetNumThreadContexts();
       std::vector<lldb::tid_t> tids;
       if (core_objfile->GetCorefileThreadExtraInfos(tids)) {
diff --git a/lldb/source/Target/DynamicRegisterInfo.cpp b/lldb/source/Target/DynamicRegisterInfo.cpp
index b964dc5877a9..e3a055fa1ce3 100644
--- a/lldb/source/Target/DynamicRegisterInfo.cpp
+++ b/lldb/source/Target/DynamicRegisterInfo.cpp
@@ -245,8 +245,6 @@ DynamicRegisterInfo::SetRegisterInfo(const StructuredData::Dictionary &dict,
     // 'encoding':'uint' , 'format':'hex'         , 'set': 0, 'ehframe' : 2,
     // 'dwarf' : 2, 'generic':'arg4', 'alt-name':'arg4', },
     RegisterInfo reg_info;
-    std::vector<uint32_t> value_regs;
-    std::vector<uint32_t> invalidate_regs;
     memset(&reg_info, 0, sizeof(reg_info));
 
     llvm::StringRef name_val;
diff --git a/lldb/source/Target/Statistics.cpp b/lldb/source/Target/Statistics.cpp
index 499d1333c3d9..4cfd0629ea27 100644
--- a/lldb/source/Target/Statistics.cpp
+++ b/lldb/source/Target/Statistics.cpp
@@ -309,7 +309,6 @@ llvm::json::Value DebuggerStats::ReportStatistics(
   uint32_t debug_index_saved = 0;
   uint64_t debug_info_size = 0;
 
-  std::vector<ModuleStats> modules;
   std::lock_guard<std::recursive_mutex> guard(
       Module::GetAllocationModuleCollectionMutex());
   const uint64_t num_modules = target != nullptr
diff --git a/lldb/unittests/Utility/DataEncoderTest.cpp b/lldb/unittests/Utility/DataEncoderTest.cpp
index 5f5ff37bced1..8d502f0f80b5 100644
--- a/lldb/unittests/Utility/DataEncoderTest.cpp
+++ b/lldb/unittests/Utility/DataEncoderTest.cpp
@@ -41,7 +41,6 @@ TEST(DataEncoderTest, PutU8) {
 
 TEST(DataEncoderTest, AppendUnsignedLittle) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderLittle, addr_size);
   encoder.AppendU8(0x11);
   ASSERT_EQ(encoder.GetData(), ArrayRef<uint8_t>({0x11}));
@@ -59,7 +58,6 @@ TEST(DataEncoderTest, AppendUnsignedLittle) {
 
 TEST(DataEncoderTest, AppendUnsignedBig) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderBig, addr_size);
   encoder.AppendU8(0x11);
   ASSERT_EQ(encoder.GetData(), ArrayRef<uint8_t>({0x11}));
@@ -76,7 +74,6 @@ TEST(DataEncoderTest, AppendUnsignedBig) {
 
 TEST(DataEncoderTest, AppendAddress4Little) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderLittle, addr_size);
   encoder.AppendAddress(0x11223344);
   ASSERT_EQ(encoder.GetData(), ArrayRef<uint8_t>({0x44, 0x33, 0x22, 0x11}));
@@ -87,7 +84,6 @@ TEST(DataEncoderTest, AppendAddress4Little) {
 
 TEST(DataEncoderTest, AppendAddress4Big) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderBig, addr_size);
   encoder.AppendAddress(0x11223344);
   ASSERT_EQ(encoder.GetData(), ArrayRef<uint8_t>({0x11, 0x22, 0x33, 0x44}));
@@ -98,7 +94,6 @@ TEST(DataEncoderTest, AppendAddress4Big) {
 
 TEST(DataEncoderTest, AppendAddress8Little) {
   const uint32_t addr_size = 8;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderLittle, addr_size);
   encoder.AppendAddress(0x11223344);
   ASSERT_EQ(encoder.GetData(),
@@ -111,7 +106,6 @@ TEST(DataEncoderTest, AppendAddress8Little) {
 
 TEST(DataEncoderTest, AppendAddress8Big) {
   const uint32_t addr_size = 8;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderBig, addr_size);
   encoder.AppendAddress(0x11223344);
   ASSERT_EQ(encoder.GetData(),
@@ -124,7 +118,6 @@ TEST(DataEncoderTest, AppendAddress8Big) {
 
 TEST(DataEncoderTest, AppendData) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderBig, addr_size);
   // Make sure default constructed StringRef appends nothing
   encoder.AppendData(StringRef());
@@ -139,7 +132,6 @@ TEST(DataEncoderTest, AppendData) {
 
 TEST(DataEncoderTest, AppendCString) {
   const uint32_t addr_size = 4;
-  std::vector<uint8_t> expected;
   DataEncoder encoder(lldb::eByteOrderBig, addr_size);
   // Make sure default constructed StringRef appends nothing
   encoder.AppendCString(StringRef());