Index: gmic-1.6.5.0/src/CImg.h
===================================================================
--- gmic-1.6.5.0.orig/src/CImg.h
+++ gmic-1.6.5.0/src/CImg.h
@@ -49065,9 +49065,9 @@ namespace cimg_library_suffixed {
                    filename?filename:"(FILE*)");
 #endif
       std::FILE *const nfile = file?file:cimg::fopen(filename,"wb");
       const char *const ptype = pixel_type(), *const etype = cimg::endianness()?"big":"little";
-      if (std::strstr(ptype,"unsigned")==ptype) std::fprintf(nfile,"%u unsigned_%s %s_endian\n",_width,ptype + 9,etype);
+      if (std::strlen(ptype) > 9 && std::strstr(ptype,"unsigned")==ptype) std::fprintf(nfile,"%u unsigned_%s %s_endian\n",_width,ptype + 9,etype);
       else std::fprintf(nfile,"%u %s %s_endian\n",_width,ptype,etype);
       cimglist_for(*this,l) {
         const CImg<T>& img = _data[l];
         std::fprintf(nfile,"%u %u %u %u",img._width,img._height,img._depth,img._spectrum);
@@ -49615,9 +49615,9 @@ namespace cimg_library_suffixed {
 #endif
       CImgList<ucharT> stream;
       CImg<charT> tmpstr(128);
       const char *const ptype = pixel_type(), *const etype = cimg::endianness()?"big":"little";
-      if (std::strstr(ptype,"unsigned")==ptype)
+      if (std::strlen(ptype) > 9 && std::strstr(ptype,"unsigned")==ptype)
         cimg_snprintf(tmpstr,tmpstr._width,"%u unsigned_%s %s_endian\n",_width,ptype + 9,etype);
       else
         cimg_snprintf(tmpstr,tmpstr._width,"%u %s %s_endian\n",_width,ptype,etype);
       CImg<ucharT>::string(tmpstr,false).move_to(stream);