eval: keep references to function contexts

Otherwise the "this" context might be gc'ed before the function can access it.
This bug manifested itself with long chained expressions such as:

    require("fs").open("file.txt").read(10)

The file handle produced by open() was gc'ed before invoking read() on it due
to the evaluation not increasing its refcount.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

0 files changed, 0 insertions, 0 deletions