--- old/src/os/posix/vm/os_posix.hpp	2017-03-14 12:10:21.409924000 +0100
+++ new/src/os/posix/vm/os_posix.hpp	2017-03-14 12:10:21.188909000 +0100
@@ -100,7 +100,7 @@
   //   is longer than PATH_MAX.
   // On success, it will return a pointer to the input buffer.
   // On error, it will return NULL and set errno. Content of output buffer is undefined.
-  // On truncation error (output buffer too small), it will return NULL and set errno to EINVAL.
+  // On truncation error (output buffer too small), it will return NULL and set errno to ENAMETOOLONG.
   static char* realpath(const char* filename, char* outbuf, size_t outbuflen);
 
 };