Addresses an unsigned underflow situation that can occur when dumping an empty command history.

One example where this occurs in practice is starting the Swift REPL and typing ":command history" since REPL commands aren't stored in the LLDB command prompt history.

llvm-svn: 256888

1 files changed, 2 insertions, 2 deletions

diff --git a/lldb/source/Interpreter/CommandHistory.cpp b/lldb/source/Interpreter/CommandHistory.cpp
index bbe64b446ac..9d3c814697b 100644
--- a/lldb/source/Interpreter/CommandHistory.cpp
+++ b/lldb/source/Interpreter/CommandHistory.cpp
@@ -130,9 +130,9 @@ CommandHistory::Dump (Stream& stream,
                       size_t stop_idx) const
 {
     Mutex::Locker locker(m_mutex);
-    stop_idx = std::min(stop_idx, m_history.size() - 1);
+    stop_idx = std::min(stop_idx + 1, m_history.size());
     for (size_t counter = start_idx;
-         counter <= stop_idx;
+         counter < stop_idx;
          counter++)
     {
         const std::string hist_item = m_history[counter];