Fix warnings from clang scanbuild.

Source/CPack/cmCPackDebGenerator.cxx

@@ -507,6 +507,11 @@ int cmCPackDebGenerator::createDeb()
       //int retVal = -1;
       res = cmSystemTools::RunSingleCommand(cmd.c_str(), &output,
           &retval, toplevel.c_str(), this->GeneratorVerbose, 0);
+      if ( !res || retval )
+        {
+        cmCPackLogger(cmCPackLog::LOG_ERROR, "Problem running cmake -E md5sum "
+                      << cmd << std::endl);
+        }
       // debian md5sums entries are like this:
       // 014f3604694729f3bf19263bac599765  usr/bin/ccmake
       // thus strip the full path (with the trailing slash)

Source/cmCTest.cxx

@@ -1343,16 +1343,21 @@ int cmCTest::RunTest(std::vector<const char*> argv,
       }
 
     *retVal = inst.Run(args, output);
+    if(output)
+      {
       *output += oss.str();
-    if ( log )
+      }
+    if ( log && output)
       {
       *log << *output;
       }
     cmSystemTools::ChangeDirectory(oldpath);
-
+    if(output)
+      {
       cmCTestLog(this, HANDLER_VERBOSE_OUTPUT,
                  "Internal cmCTest object used to run test." << std::endl
                  <<  *output << std::endl);
+      }
 
     return cmsysProcess_State_Exited;
     }
@@ -1422,7 +1427,10 @@ int cmCTest::RunTest(std::vector<const char*> argv,
     *retVal = cmsysProcess_GetExitException(cp);
     std::string outerr = "\n*** Exception executing: ";
     outerr += cmsysProcess_GetExceptionString(cp);
+    if(output)
+      {
       *output += outerr;
+      }
     cmCTestLog(this, HANDLER_VERBOSE_OUTPUT, outerr.c_str() << std::endl
       << std::flush);
     }
@@ -1430,7 +1438,10 @@ int cmCTest::RunTest(std::vector<const char*> argv,
     {
     std::string outerr = "\n*** ERROR executing: ";
     outerr += cmsysProcess_GetErrorString(cp);
+    if(output)
+      {
       *output += outerr;
+      }
     cmCTestLog(this, HANDLER_VERBOSE_OUTPUT, outerr.c_str() << std::endl
       << std::flush);
     }

Source/cmFileCommand.cxx

@@ -3422,6 +3422,7 @@ cmFileCommand::HandleUploadCommand(std::vector<std::string> const& args)
 
   // enable HTTP ERROR parsing
   ::CURLcode res = ::curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
+  check_curl_result(res, "UPLOAD cannot set fail on error flag: ");
 
   // enable uploading
   res = ::curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);

Source/cmFindPackageCommand.cxx

@@ -679,7 +679,6 @@ bool cmFindPackageCommand::HandlePackageMode()
     if(cmSystemTools::IsOff(def) || !fileFound)
       {
       fileFound = this->FindConfig();
-      def = this->Makefile->GetDefinition(this->Variable);
       }
 
     // Sanity check.
@@ -1598,7 +1597,6 @@ bool cmFindPackageCommand::CheckVersion(std::string const& config_file)
   if ((haveResult == false) && (this->Version.empty()))
     {
     result = true;
-    haveResult = true;
     }
 
   ConfigFileInfo configFileInfo;

Source/cmMakefile.cxx

@@ -2208,7 +2208,7 @@ void cmMakefile::AddSourceGroup(const std::vector<std::string>& name,
   if(i==lastElement)
     {
     // group already exists, replace its regular expression
-    if ( regex )
+    if ( regex && sg)
       {
       // We only want to set the regular expression.  If there are already
       // source files in the group, we don't want to remove them.
@@ -2224,7 +2224,11 @@ void cmMakefile::AddSourceGroup(const std::vector<std::string>& name,
     sg = this->GetSourceGroup(currentName);
     i = 0; // last component found
     }
-
+  if(!sg)
+    {
+    cmSystemTools::Error("Could not create source group ");
+    return;
+    }
   // build the whole source group path
   const char* fullname = sg->GetFullName();
   cmGlobalGenerator* gg = this->LocalGenerator->GetGlobalGenerator();

Source/cmSetTargetPropertiesCommand.cxx

@@ -25,14 +25,12 @@ bool cmSetTargetPropertiesCommand
 
   // first collect up the list of files
   std::vector<std::string> propertyPairs;
-  bool doingFiles = true;
   int numFiles = 0;
   std::vector<std::string>::const_iterator j;
   for(j= args.begin(); j != args.end();++j)
     {
     if(*j == "PROPERTIES")
       {
-      doingFiles = false;
       // now loop through the rest of the arguments, new style
       ++j;
       if (std::distance(j, args.end()) % 2 != 0)
@@ -43,15 +41,9 @@ bool cmSetTargetPropertiesCommand
       propertyPairs.insert(propertyPairs.end(), j, args.end());
       break;
       }
-    else if (doingFiles)
-      {
-      numFiles++;
-      }
     else
       {
-      this->SetError("called with illegal arguments, maybe missing "
-                     "a PROPERTIES specifier?");
-      return false;
+      numFiles++;
       }
     }
   if(propertyPairs.empty())