diff --git a/lldb/source/Commands/CommandObjectCommands.cpp b/lldb/source/Commands/CommandObjectCommands.cpp
index 9510cf4d14467..10dc273e39ab9 100644
--- a/lldb/source/Commands/CommandObjectCommands.cpp
+++ b/lldb/source/Commands/CommandObjectCommands.cpp
@@ -1537,9 +1537,8 @@ class CommandObjectScriptingObjectParsed : public CommandObjectParsed {
           option_def.completion_type = (CommandArgumentType) completion_type;
         } else
           option_def.completion_type = eNoCompletion;
-        
+
         // Usage Text:
-        std::string usage_text;
         obj_sp = opt_dict->GetValueForKey("help");
         if (!obj_sp) {
           error = Status::FromErrorStringWithFormatv(
diff --git a/lldb/source/Core/FormatEntity.cpp b/lldb/source/Core/FormatEntity.cpp
index 40e247a64b78c..f1c831b7ccc1e 100644
--- a/lldb/source/Core/FormatEntity.cpp
+++ b/lldb/source/Core/FormatEntity.cpp
@@ -2471,7 +2471,6 @@ static void AddMatches(const Definition *def, const llvm::StringRef &prefix,
   const size_t n = def->num_children;
   if (n > 0) {
     for (size_t i = 0; i < n; ++i) {
-      std::string match = prefix.str();
       if (match_prefix.empty())
         matches.AppendString(MakeMatch(prefix, def->children[i].name));
       else if (strncmp(def->children[i].name, match_prefix.data(),
diff --git a/lldb/source/DataFormatters/CXXFunctionPointer.cpp b/lldb/source/DataFormatters/CXXFunctionPointer.cpp
index e17659ad0f2f0..d79fb1d678ebd 100644
--- a/lldb/source/DataFormatters/CXXFunctionPointer.cpp
+++ b/lldb/source/DataFormatters/CXXFunctionPointer.cpp
@@ -23,7 +23,6 @@ using namespace lldb_private::formatters;
 
 bool lldb_private::formatters::CXXFunctionPointerSummaryProvider(
     ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
-  std::string destination;
   StreamString sstr;
   AddressType func_ptr_address_type = eAddressTypeInvalid;
   addr_t func_ptr_address = valobj.GetPointerValue(&func_ptr_address_type);
diff --git a/lldb/source/Expression/DiagnosticManager.cpp b/lldb/source/Expression/DiagnosticManager.cpp
index b1fa14bccc17b..4c0233d467c95 100644
--- a/lldb/source/Expression/DiagnosticManager.cpp
+++ b/lldb/source/Expression/DiagnosticManager.cpp
@@ -83,7 +83,6 @@ std::string DiagnosticManager::GetString(char separator) {
     stream << severity;
 
     llvm::StringRef message = diagnostic->GetMessage();
-    std::string searchable_message = message.lower();
     auto severity_pos = message.find(severity);
     stream << message.take_front(severity_pos);
 
diff --git a/lldb/source/Interpreter/CommandObject.cpp b/lldb/source/Interpreter/CommandObject.cpp
index 7008253e32bca..72dd546dd6523 100644
--- a/lldb/source/Interpreter/CommandObject.cpp
+++ b/lldb/source/Interpreter/CommandObject.cpp
@@ -338,14 +338,11 @@ void CommandObject::HandleArgumentCompletion(
 
 }
 
-
 bool CommandObject::HelpTextContainsWord(llvm::StringRef search_word,
                                          bool search_short_help,
                                          bool search_long_help,
                                          bool search_syntax,
                                          bool search_options) {
-  std::string options_usage_help;
-
   bool found_word = false;
 
   llvm::StringRef short_help = GetHelp();
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index adedfa8ece917..d8c7e436f3f8b 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -904,7 +904,6 @@ Status GDBRemoteCommunication::StartDebugserverProcess(
   if (!debugserver_file_spec)
     return Status::FromErrorString("unable to locate " DEBUGSERVER_BASENAME);
 
-  std::string debugserver_path = debugserver_file_spec.GetPath();
   launch_info.SetExecutableFile(debugserver_file_spec,
                                 /*add_exe_file_as_first_arg=*/true);
 
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 748f95c61cd3c..c4c2a8aab3c98 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -2151,7 +2151,6 @@ bool GDBRemoteCommunicationClient::GetCurrentProcessInfo(bool allow_lazy) {
       llvm::StringRef value;
       uint32_t cpu = LLDB_INVALID_CPUTYPE;
       uint32_t sub = 0;
-      std::string arch_name;
       std::string os_name;
       std::string environment;
       std::string vendor_name;
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index f924d1194e8a1..709d09fc887bc 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -2056,7 +2056,6 @@ ProcessGDBRemote::SetThreadStopInfo(StructuredData::Dictionary *thread_dict) {
   // Stop with signal and thread info
   lldb::tid_t tid = LLDB_INVALID_THREAD_ID;
   uint8_t signo = 0;
-  std::string value;
   std::string thread_name;
   std::string reason;
   std::string description;
@@ -2276,7 +2275,6 @@ StateType ProcessGDBRemote::SetThreadStopInfo(StringExtractor &stop_packet) {
         m_jstopinfo_sp = StructuredData::ParseJSON(json);
       } else if (key.compare("hexname") == 0) {
         StringExtractor name_extractor(value);
-        std::string name;
         // Now convert the HEX bytes into a string value
         name_extractor.GetHexByteString(thread_name);
       } else if (key.compare("name") == 0) {
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
index 16c3226c7f62b..0c864dc85ce71 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
@@ -2567,8 +2567,6 @@ bool ScriptInterpreterPythonImpl::RunScriptBasedCommand(
 
   bool ret_val = false;
 
-  std::string err_msg;
-
   {
     Locker py_lock(this,
                    Locker::AcquireLock | Locker::InitSession |
@@ -2612,8 +2610,6 @@ bool ScriptInterpreterPythonImpl::RunScriptBasedCommand(
 
   bool ret_val = false;
 
-  std::string err_msg;
-
   {
     Locker py_lock(this,
                    Locker::AcquireLock | Locker::InitSession |
@@ -2657,8 +2653,6 @@ bool ScriptInterpreterPythonImpl::RunScriptBasedParsedCommand(
 
   bool ret_val = false;
 
-  std::string err_msg;
-
   {
     Locker py_lock(this,
                    Locker::AcquireLock | Locker::InitSession |
@@ -3166,8 +3160,6 @@ void ScriptInterpreterPythonImpl::Initialize() {
 
 void ScriptInterpreterPythonImpl::AddToSysPath(AddLocation location,
                                                std::string path) {
-  std::string path_copy;
-
   std::string statement;
   if (location == AddLocation::Beginning) {
     statement.assign("sys.path.insert(0,\"");
diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/CompileUnitIndex.cpp b/lldb/source/Plugins/SymbolFile/NativePDB/CompileUnitIndex.cpp
index 25d04f999ad67..46bdd6cd27bf2 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/CompileUnitIndex.cpp
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/CompileUnitIndex.cpp
@@ -177,7 +177,6 @@ CompilandIndexItem &CompileUnitIndex::GetOrCreateCompiland(uint16_t modi) {
   // name until we find it, and we can cache that one since the memory is backed
   // by a contiguous chunk inside the mapped PDB.
   llvm::SmallString<64> main_file = GetMainSourceFile(*cci);
-  std::string s = std::string(main_file.str());
   llvm::sys::path::native(main_file);
 
   uint32_t file_count = modules.getSourceFileCount(modi);
diff --git a/lldb/source/Target/Platform.cpp b/lldb/source/Target/Platform.cpp
index 3e7546048e586..8000cd07565ae 100644
--- a/lldb/source/Target/Platform.cpp
+++ b/lldb/source/Target/Platform.cpp
@@ -492,7 +492,6 @@ Status Platform::Install(const FileSpec &src, const FileSpec &dst) {
       // the platform's working directory
       if (!fixed_dst.GetDirectory()) {
         FileSpec relative_spec;
-        std::string path;
         if (working_dir) {
           relative_spec = working_dir;
           relative_spec.AppendPathComponent(dst.GetPath());
diff --git a/lldb/source/Utility/ArchSpec.cpp b/lldb/source/Utility/ArchSpec.cpp
index 2e6c6a6ffcbe4..70b9800f4dade 100644
--- a/lldb/source/Utility/ArchSpec.cpp
+++ b/lldb/source/Utility/ArchSpec.cpp
@@ -1455,7 +1455,6 @@ bool ArchSpec::IsFullySpecifiedTriple() const {
 }
 
 bool ArchSpec::IsAlwaysThumbInstructions() const {
-  std::string Status;
   if (GetTriple().getArch() == llvm::Triple::arm ||
       GetTriple().getArch() == llvm::Triple::thumb) {
     // v. https://en.wikipedia.org/wiki/ARM_Cortex-M
diff --git a/lldb/unittests/Utility/LogTest.cpp b/lldb/unittests/Utility/LogTest.cpp
index b9b0af4133da9..cd1407263c267 100644
--- a/lldb/unittests/Utility/LogTest.cpp
+++ b/lldb/unittests/Utility/LogTest.cpp
@@ -160,7 +160,6 @@ TEST(LogTest, Unregister) {
   llvm::llvm_shutdown_obj obj;
   Log::Register("chan", test_channel);
   EXPECT_EQ(nullptr, GetLog(TestChannel::FOO));
-  std::string message;
   auto log_handler_sp = std::make_shared<TestLogHandler>();
   EXPECT_TRUE(
       Log::EnableLogChannel(log_handler_sp, 0, "chan", {"foo"}, llvm::nulls()));
@@ -214,7 +213,6 @@ TEST(LogHandlerTest, TeeLogHandler) {
 
 TEST_F(LogChannelTest, Enable) {
   EXPECT_EQ(nullptr, GetLog(TestChannel::FOO));
-  std::string message;
   auto log_handler_sp = std::make_shared<TestLogHandler>();
   std::string error;
   ASSERT_FALSE(EnableChannel(log_handler_sp, 0, "chanchan", {}, error));
@@ -236,7 +234,6 @@ TEST_F(LogChannelTest, Enable) {
 
 TEST_F(LogChannelTest, EnableOptions) {
   EXPECT_EQ(nullptr, GetLog(TestChannel::FOO));
-  std::string message;
   auto log_handler_sp = std::make_shared<TestLogHandler>();
   std::string error;
   EXPECT_TRUE(EnableChannel(log_handler_sp, LLDB_LOG_OPTION_VERBOSE, "chan", {},
@@ -249,7 +246,6 @@ TEST_F(LogChannelTest, EnableOptions) {
 
 TEST_F(LogChannelTest, Disable) {
   EXPECT_EQ(nullptr, GetLog(TestChannel::FOO));
-  std::string message;
   auto log_handler_sp = std::make_shared<TestLogHandler>();
   std::string error;
   EXPECT_TRUE(EnableChannel(log_handler_sp, 0, "chan", {"foo", "bar"}, error));