Handle null level 2 metadata records

test/data

@@ -1 +1 @@
-Subproject commit 45539a5b0ecfc6baaaf7355b6b9542cc31ed9ecd
+Subproject commit 29c40b6024935ac9e2c76bd092e2a1dd05c3f307

test/source/scwx/wsr88d/ar2v_file.test.cpp

@@ -19,5 +19,15 @@ TEST(ar2v_file, klsx)
    EXPECT_EQ(fileValid, true);
 }
 
+TEST(ar2v_file, tstl)
+{
+   Ar2vFile file;
+   bool     fileValid =
+      file.LoadFile(std::string(SCWX_TEST_DATA_DIR) +
+                    "/nexrad/level2/Level2_TSTL_20220213_2357.ar2v");
+
+   EXPECT_EQ(fileValid, true);
+}
+
 } // namespace wsr88d
 } // namespace scwx

wxdata/source/scwx/wsr88d/ar2v_file.cpp

@@ -329,18 +329,6 @@ void Ar2vFileImpl::ParseLDMRecord(std::istream& is)
 
    while (!is.eof())
    {
-      rda::Level2MessageInfo msgInfo = rda::Level2MessageFactory::Create(is);
-      if (!msgInfo.headerValid)
-      {
-         // Invalid message
-         break;
-      }
-
-      if (msgInfo.messageValid)
-      {
-         HandleMessage(msgInfo.message);
-      }
-
       off_t    offset   = 0;
       uint16_t nextSize = 0u;
       do
@@ -361,6 +349,22 @@ void Ar2vFileImpl::ParseLDMRecord(std::istream& is)
          BOOST_LOG_TRIVIAL(trace)
             << logPrefix_ << "Next record offset by " << offset << " bytes";
       }
+      else if (is.eof())
+      {
+         break;
+      }
+
+      rda::Level2MessageInfo msgInfo = rda::Level2MessageFactory::Create(is);
+      if (!msgInfo.headerValid)
+      {
+         // Invalid message
+         break;
+      }
+
+      if (msgInfo.messageValid)
+      {
+         HandleMessage(msgInfo.message);
+      }
    }
 }