lib: Perfized `to_hex` and have it work anywhere in a `Text`

[nit.git] / lib / core / file.nit

diff --git a/lib/core/file.nit b/lib/core/file.nit
index 03955eb..fd848e1 100644 (file)
--- a/lib/core/file.nit
+++ b/lib/core/file.nit
@@ -959,10 +959,13 @@ redef class String
        end
 
        # Return the canonicalized absolute pathname (see POSIX function `realpath`)
+       #
+       # Require: `file_exists`
        fun realpath: String do
                var cs = to_cstring.file_realpath
+               assert file_exists
                var res = cs.to_s_with_copy
-               # cs.free_malloc # FIXME memory leak
+               cs.free
                return res
        end