Bug#880703: test-suite failure on s390x

Source: json-glib
Version: 1.4.2-1
Severity: serious
Forwarded: https://gitlab.gnome.org/GNOME/json-glib/issues/28

The test-suite fails on s390x:

 1/14 array                                   OK       0.01 s
 2/14 boxed                                   OK       0.01 s
 3/14 builder                                 OK       0.01 s
 4/14 generator                               OK       0.01 s
 5/14 gvariant                                OK       0.01 s
 6/14 invalid                                 OK       0.00 s
 7/14 node                                    FAIL     0.01 s
 8/14 object                                  OK       0.00 s
 9/14 parser                                  OK       0.01 s
10/14 path                                    OK       0.01 s
11/14 reader                                  OK       0.00 s
12/14 serialize-simple                        OK       0.00 s
13/14 serialize-complex                       OK       0.00 s
14/14 serialize-full                          OK       0.00 s

OK:        13
FAIL:       1
SKIP:       0
TIMEOUT:    0


The output from the failed tests:

 7/14 node                                    FAIL     0.01 s

--- command ---
G_TEST_SRCDIR='/<<PKGBUILDDIR>>/json-glib/tests' G_TEST_BUILDDIR='/<<PKGBUILDDIR>>/obj-s390x-linux-gnu/json-glib/tests' /<<PKGBUILDDIR>>/obj-s390x-linux-gnu/json-glib/tests/node --tap -k
--- stdout ---
# random seed: R02Scd9cf85c8a3182658ed0f0a8ffed8b47
1..27
# Start of nodes tests
ok 1 /nodes/gvalue
# Start of init tests
ok 2 /nodes/init/int
ok 3 /nodes/init/double
ok 4 /nodes/init/boolean
ok 5 /nodes/init/string
ok 6 /nodes/init/null
# End of init tests
# Start of copy tests
ok 7 /nodes/copy/null
ok 8 /nodes/copy/value
ok 9 /nodes/copy/object
# End of copy tests
# Start of get tests
ok 10 /nodes/get/int
ok 11 /nodes/get/double
# End of get tests
# Start of gvalue tests
# Json:ERROR:../json-glib/tests/node.c:235:test_gvalue_autopromotion: assertion failed ((float) g_value_get_double (&check) == 3.14159f): (3.14159012 == 3.14159)
--- stderr ---
**
Json:ERROR:../json-glib/tests/node.c:235:test_gvalue_autopromotion: assertion failed ((float) g_value_get_double (&check) == 3.14159f): (3.14159012 == 3.14159)
-------

The full build log is available at https://buildd.debian.org/status/fetch.php?pkg=json-glib&arch=s390x&ver=1.4.2-1&stamp=1509747369&raw=0


-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8), LANGUAGE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)