diff --git a/.travis.yml b/.travis.yml
index 08c3d6f0..7b71b9ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,11 +8,11 @@ cache:
 
 matrix:
   include:
-    - env: CXX=g++-5 CC=gcc-5
+    - env: CXX=g++-8
       addons:
         apt:
           packages:
-            - g++-5
+            - g++-8
             - libjpeg8-dev
             - libpng-dev
             - libasound2-dev
@@ -21,7 +21,7 @@ matrix:
             - libx11-dev
             - libxft-dev
             - libxcursor-dev
-          sources: 
+          sources:
             - ubuntu-toolchain-r-test
             
   allow_failures:		
@@ -44,7 +44,7 @@ matrix:
 
 before_install:
   - cd ..
-  - git clone --depth=1 --branch=cmake-dev https://github.com/qPCR4vir/nana-demo.git nana-demo
+  - git clone --depth=1 --branch=hotfix https://github.com/qPCR4vir/nana-demo.git nana-demo
   - export PATH="$HOME/bin:$PATH"
 
   #- mkdir ~/bin #it seemd that a bin already exists from 20170901 
diff --git a/include/nana/filesystem/filesystem.hpp b/include/nana/filesystem/filesystem.hpp
index f14c043f..beaa1545 100644
--- a/include/nana/filesystem/filesystem.hpp
+++ b/include/nana/filesystem/filesystem.hpp
@@ -254,7 +254,7 @@ namespace nana  { namespace experimental { namespace filesystem
 		path relative_path() const;
 		path parent_path() const;
 		path filename() const;
-		//path stem() const;
+		path stem() const;
 		path extension() const;
 
 		// query
diff --git a/source/filesystem/filesystem.cpp b/source/filesystem/filesystem.cpp
index b13e8465..061a12f7 100644
--- a/source/filesystem/filesystem.cpp
+++ b/source/filesystem/filesystem.cpp
@@ -225,8 +225,10 @@ namespace nana {	namespace experimental {	namespace filesystem
 		//Because of No wide character version of POSIX
 #if defined(NANA_POSIX)
 		const char* separators = "/";
+		const char* punt = ".";
 #else
 		const wchar_t* separators = L"/\\";
+		const wchar_t* punt = L".";
 #endif
 
 	//class file_status
@@ -453,6 +455,22 @@ namespace nana {	namespace experimental {	namespace filesystem
 			return{ pathstr_ };
 		}
 
+        path path::stem() const
+        {
+            auto pos = pathstr_.find_last_of(separators);
+            auto ext = pathstr_.find_last_of(punt);
+
+            if (pos == pathstr_.npos)
+                pos = 0;
+            else
+                pos++;
+
+            if (ext == pathstr_.npos || ext < pos)
+                return path(pathstr_.substr(pos));
+            else
+                return path(pathstr_.substr(pos, ext-pos));
+        }
+
 		void path::clear() noexcept
 		{
 			pathstr_.clear();
diff --git a/source/gui/filebox.cpp b/source/gui/filebox.cpp
index 5b2db9e2..aff5b2a7 100644
--- a/source/gui/filebox.cpp
+++ b/source/gui/filebox.cpp
@@ -1359,7 +1359,7 @@ namespace nana
 			path.resize(len);
 
 			impl_->path = to_utf8(path);
-		}
+        }
 #endif
 	}
 
@@ -1589,7 +1589,7 @@ namespace nana
 	};
 
 	folderbox::folderbox(window owner, const path_type& init_path, std::string title)
-		: impl_(new implement{ owner, fs::canonical(init_path).make_preferred(), title, false})
+		: impl_(new implement{ owner, fs::weakly_canonical(init_path).make_preferred(), title, false})
 	{}