bug#26542: guile 2.0.13

[Pach Roman (DGS-EC/ESG4)]

Hello!

I can confirm now the same problem on Cygwin.

2.0.11 runs without errors
2.0.13 behaves identically as on linux. i.e. the function free_box(SCM box_smob)
is called with a bad smob identifier.