InterventionBackend logging

patch.patch

diff --git a/src/InterventionBackend.php b/src/InterventionBackend.php
index 81bcd97..dc251bc 100644
--- a/src/InterventionBackend.php
+++ b/src/InterventionBackend.php
@@ -13,6 +13,7 @@ use Intervention\Image\Size;
 use InvalidArgumentException;
 use LogicException;
 use Psr\Http\Message\StreamInterface;
+use Psr\Log\LoggerInterface;
 use Psr\SimpleCache\CacheInterface;
 use SilverStripe\Assets\Storage\AssetContainer;
 use SilverStripe\Assets\Storage\AssetStore;
@@ -271,6 +272,10 @@ class InterventionBackend implements Image_Backend, Flushable
             // Handle unsupported image encoding on load (will be marked as failed)
             // Unsupported exceptions are handled without being raised as exceptions
             $error = self::FAILED_INVALID;
+
+            if (Injector::inst()->has(LoggerInterface::class.'.InterventionBackend')) {
+                Injector::inst()->get(LoggerInterface::class.'.InterventionBackend')->error($ex->getMessage(), ['exception' => $ex]);
+            }
         } finally {
             if ($error) {
                 $this->markFailed($hash, $variant, $error);