From ea409a75dc4f54cbaaa587b632e9895cec908f78 Mon Sep 17 00:00:00 2001
From: Howard Butler <howard@hobu.co>
Date: Wed, 10 Jun 2015 20:25:25 -0500
Subject: [PATCH] protect initialization of LasReader stream from destruction
 (NITF driver interaction

---
 io/las/LasReader.cpp | 1 +
 io/las/LasReader.hpp | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/io/las/LasReader.cpp b/io/las/LasReader.cpp
index a21a17ae63..6b3a2524ab 100644
--- a/io/las/LasReader.cpp
+++ b/io/las/LasReader.cpp
@@ -826,6 +826,7 @@ void LasReader::done(PointTableRef)
     m_unzipper.reset();
 #endif
     destroyStream();
+    m_initialized = false;
 }
 
 } // namespace pdal
diff --git a/io/las/LasReader.hpp b/io/las/LasReader.hpp
index 4ab4e62dd0..7794c14bef 100644
--- a/io/las/LasReader.hpp
+++ b/io/las/LasReader.hpp
@@ -88,7 +88,14 @@ class PDAL_DLL LasReader : public pdal::Reader
         return m_istream;
     }
     virtual void destroyStream()
-        { FileUtils::closeFile(m_istream); m_istream = NULL; m_initialized = false; }
+        {
+            if (m_istream && m_initialized)
+            {
+                FileUtils::closeFile(m_istream);
+                m_istream = NULL;
+                m_initialized = false;
+            }
+        }
 private:
     LasError m_error;
     LasHeader m_lasHeader;