id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12108,boost::filesystem::canonical() enters infinite loop when current path is a directory symlink on windows,Tony Abbott <tony.abbott@…>,Beman Dawes,"On Windows platforms, when the current path is a directory symlink, boost::filesystem::canonical() enters an infinite loop.

Verified using attached program on Windows 8.1 and Windows Server 2012.

The problem occurs because when the current path is a directory symlink then boost::filesystem::is_symlink(path(""c:"")) returns true.

Assuming the following paths:

myDir  = c:\temp\symlink-example\dir
mySym  = c:\temp\symlink-example\sym -> myDir
myFile = c:\temp\symlink-example\dir\hello.txt

When current path is set to mySym and canonical(myFile) is called:

* The path components of myFile are iterated over (operations.cpp:827)
* ""c:"" is the first component. It is considered a symlink and expanded (operations.cpp:844)
* The path then becomes c:\temp\symlink-example\dir\temp\symlink-example\dir\hello.txt
* scan is set true and the loop repeats. ""c:"" is again expanded. The loop repeats infinitely as the path grows longer and longer



",Bugs,new,To Be Determined,filesystem,Boost 1.60.0,Problem,,,