MAGETWO-44469: There are errors while switching Magento to "production" mode

Author: Oleh Posyniak

app/code/Magento/Deploy/Model/Deployer.php

@@ -312,12 +312,11 @@ private function deployFile($filePath, $area, $themePath, $locale, $module)
             }
         }
 
-        $logMessage = "Processing file '$filePath' for area '$area', theme '$themePath', locale '$locale'";
-        if ($module) {
-            $logMessage .= ", module '$module'";
-        }
-
         if ($this->output->isVeryVerbose()) {
+            $logMessage = "Processing file '$filePath' for area '$area', theme '$themePath', locale '$locale'";
+            if ($module) {
+                $logMessage .= ", module '$module'";
+            }
             $this->output->writeln($logMessage);
         }
 

lib/internal/Magento/Framework/View/Asset/Source.php

@@ -128,9 +128,12 @@ private function preProcess(LocalInterface $asset)
         $this->preProcessorPool->process($chain);
         $chain->assertValid();
         $dirCode = DirectoryList::ROOT;
-        if ($chain->isChanged()) {
+        $directoryReader = $this->filesystem->getDirectoryRead(DirectoryList::STATIC_VIEW);
+        $targetPath = DirectoryList::TMP_MATERIALIZATION_DIR . '/source/' . $chain->getTargetAssetPath();
+
+        if ($chain->isChanged() || !$directoryReader->isExist($targetPath)) {
             $dirCode = DirectoryList::VAR_DIR;
-            $path = DirectoryList::TMP_MATERIALIZATION_DIR . '/source/' . $chain->getTargetAssetPath();
+            $path = $targetPath;
             $this->varDir->writeFile($path, $chain->getContent());
         }
         $result = [$dirCode, $path];