https://github.com/ImageMagick/ImageMagick/issues/910

diff --git a/coders/txt.c b/coders/txt.c
index 56da485825dac2858023d1e234f936a9b50a3351..f6f671ae38b53d4d7d06b47b43d2378b833036d2 100644 (file)
--- a/coders/txt.c
+++ b/coders/txt.c
@@ -565,6 +565,7 @@ static Image *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
           break;
       }
     }
+    *text='\0';
     (void) ReadBlobString(image,text);
     if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
       {