diff --git a/lldb/source/API/SBTarget.cpp b/lldb/source/API/SBTarget.cpp
--- a/lldb/source/API/SBTarget.cpp
+++ b/lldb/source/API/SBTarget.cpp
@@ -1117,8 +1117,8 @@
     llvm::Expected<std::vector<BreakpointSP>> expected_vector =
         target_sp->GetBreakpointList().FindBreakpointsByName(name);
     if (!expected_vector) {
-      LLDB_LOG(GetLog(LLDBLog::Breakpoints), "invalid breakpoint name: {}",
-               llvm::toString(expected_vector.takeError()));
+      LLDB_LOG_ERROR(GetLog(LLDBLog::Breakpoints), expected_vector.takeError(),
+                     "invalid breakpoint name: {0}");
       return false;
     }
     for (BreakpointSP bkpt_sp : *expected_vector) {
@@ -1591,7 +1591,7 @@
 
 const char *SBTarget::GetABIName() {
   LLDB_INSTRUMENT_VA(this);
-  
+
   TargetSP target_sp(GetSP());
   if (!target_sp)
     return nullptr;
diff --git a/lldb/source/Core/Debugger.cpp b/lldb/source/Core/Debugger.cpp
--- a/lldb/source/Core/Debugger.cpp
+++ b/lldb/source/Core/Debugger.cpp
@@ -1915,8 +1915,8 @@
     if (event_handler_thread) {
       m_event_handler_thread = *event_handler_thread;
     } else {
-      LLDB_LOG(GetLog(LLDBLog::Host), "failed to launch host thread: {}",
-               llvm::toString(event_handler_thread.takeError()));
+      LLDB_LOG_ERROR(GetLog(LLDBLog::Host), event_handler_thread.takeError(),
+                     "failed to launch host thread: {0}");
     }
 
     // Make sure DefaultEventHandler() is running and listening to events
@@ -2056,8 +2056,8 @@
     if (io_handler_thread) {
       m_io_handler_thread = *io_handler_thread;
     } else {
-      LLDB_LOG(GetLog(LLDBLog::Host), "failed to launch host thread: {}",
-               llvm::toString(io_handler_thread.takeError()));
+      LLDB_LOG_ERROR(GetLog(LLDBLog::Host), io_handler_thread.takeError(),
+                     "failed to launch host thread: {0}");
     }
   }
   return m_io_handler_thread.IsJoinable();
diff --git a/lldb/source/Core/ThreadedCommunication.cpp b/lldb/source/Core/ThreadedCommunication.cpp
--- a/lldb/source/Core/ThreadedCommunication.cpp
+++ b/lldb/source/Core/ThreadedCommunication.cpp
@@ -177,8 +177,8 @@
     if (error_ptr)
       *error_ptr = Status(maybe_thread.takeError());
     else {
-      LLDB_LOG(GetLog(LLDBLog::Host), "failed to launch host thread: {}",
-               llvm::toString(maybe_thread.takeError()));
+      LLDB_LOG_ERROR(GetLog(LLDBLog::Host), maybe_thread.takeError(),
+                     "failed to launch host thread: {0}");
     }
   }
 
diff --git a/lldb/source/Host/common/ProcessLaunchInfo.cpp b/lldb/source/Host/common/ProcessLaunchInfo.cpp
--- a/lldb/source/Host/common/ProcessLaunchInfo.cpp
+++ b/lldb/source/Host/common/ProcessLaunchInfo.cpp
@@ -182,8 +182,8 @@
     llvm::Expected<HostThread> maybe_thread =
         Host::StartMonitoringChildProcess(m_monitor_callback, GetProcessID());
     if (!maybe_thread)
-      LLDB_LOG(GetLog(LLDBLog::Host), "failed to launch host thread: {}",
-               llvm::toString(maybe_thread.takeError()));
+      LLDB_LOG_ERROR(GetLog(LLDBLog::Host), maybe_thread.takeError(),
+                     "failed to launch host thread: {0}");
     return true;
   }
   return false;
diff --git a/lldb/source/Target/Process.cpp b/lldb/source/Target/Process.cpp
--- a/lldb/source/Target/Process.cpp
+++ b/lldb/source/Target/Process.cpp
@@ -3600,8 +3600,8 @@
           },
           8 * 1024 * 1024);
   if (!private_state_thread) {
-    LLDB_LOG(GetLog(LLDBLog::Host), "failed to launch host thread: {}",
-             llvm::toString(private_state_thread.takeError()));
+    LLDB_LOG_ERROR(GetLog(LLDBLog::Host), private_state_thread.takeError(),
+                   "failed to launch host thread: {0}");
     return false;
   }