id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12836	the function canonical invalidates a path if there is double dot between two symbolic links	Frantisek Boranek <fboranek@…>	Beman Dawes	"Create unit test like this:

{{{
#!cpp

void test()
{
    namespace fs = boost::filesystem;

    const fs::path base_path = createBaseDir();

    // prepare hierarchy
    fs::create_directories(base_path / ""a/b/c"");
    fs::create_directory_symlink(base_path / ""a/b"", base_path / ""sym""); // base/sym -> base/a/b

    const fs::path test1 = base_path / ""sym/../sym/c""; // if a symbolic link is resolved first will be ../s2 exist?
    TS_ASSERT(fs::exists(test1));
    TS_ASSERT(fs::exists(fs::canonical(test1)));
}

}}}

Test verify that path test1 exists, but the second calling of this function fails for a normalized path by function //canonical//. It should work otherwise the function is not reliable. The problem can be resolved if the function //canonical// first strip path from a dot and double dot and then resolve symbolic links.

I run the unit test only on Windows, but it should be no difference."	Bugs	new	To Be Determined	filesystem	Boost 1.59.0	Problem