See below.
The bug happens after commit 35a90592501ebde7e7ddbf2486ca9d315e317d09, ‘Add
unboxed floating point comparison instructions.’
> ./meta/guile
GNU Guile 2.1.6
Copyright (C) 1995-2016 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
T
The following crashes instantly; I used single-quotes by accident.
(open-file "/tmp/lg" 'w')
Stack:
Enter `,help' for help.
scheme@(guile-user)> (open-file "/tmp/lg" 'w')
Thread 1 "guile" received signal SIGSEGV, Segmentation fault.
scm_i_mode_to_open_flags (mode=mode@entry=0x55ac5660,