Skip 'test-out-of-memory', which is unreliable in Guile 2.2.4:

  https://bugs.gnu.org/34155

--- a/test-suite/standalone/Makefile.in	1969-12-31 19:00:00.000000000 -0500
+++ b/test-suite/standalone/Makefile.in	2019-05-27 16:44:32.302355990 -0400
@@ -103,7 +103,7 @@
 	test-scm-c-bind-keyword-arguments$(EXEEXT) \
 	test-srfi-4$(EXEEXT) $(am__append_6) $(am__EXEEXT_1) \
 	test-smob-mark$(EXEEXT) test-smob-mark-race$(EXEEXT) \
-	test-stack-overflow test-out-of-memory
+	test-stack-overflow
 check_PROGRAMS = test-num2integral$(EXEEXT) test-round$(EXEEXT) \
 	test-foreign-object-c$(EXEEXT) test-list$(EXEEXT) \
 	test-unwind$(EXEEXT) test-conversion$(EXEEXT) \
@@ -1938,8 +1938,7 @@
 	test-command-line-encoding test-command-line-encoding2 \
 	test-language test-guild-compile $(am__append_3) \
 	test-foreign-object-scm test-fast-slot-ref test-mb-regexp \
-	test-use-srfi $(am__append_5) test-stack-overflow \
-	test-out-of-memory
+	test-use-srfi $(am__append_5) test-stack-overflow
 BUILT_SOURCES = $(am__append_2)
 EXTRA_DIST = test-import-order-a.scm test-import-order-b.scm \
 	test-import-order-c.scm test-import-order-d.scm \
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<div class='path'>path: <a href='/guix/log/?id=849f6e0ff99ab743c8478508af9a40e48364ff67'>root</a>/<a href='/guix/log/tests?id=849f6e0ff99ab743c8478508af9a40e48364ff67'>tests</a>/<a href='/guix/log/tests/substitute.scm?id=849f6e0ff99ab743c8478508af9a40e48364ff67'>substitute.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/substitute.scm?id=849f6e0ff99ab743c8478508af9a40e48364ff67&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-11-27 00:03:03 +0100'>2019-11-27</span></td><td><a href='/guix/commit/tests/substitute.scm?id=434138e2f26b28bb5cc83e62327aae8ed0902475'>substitute: Make '%allow-unauthenticated-substitutes?' public.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/substitute.scm (warn-about-missing-authentication): New
procedure.
(%allow-unauthenticated-substitutes?): Turn into a public parameter and
use 'warn-about-missing-authentication'.
(valid-narinfo?): Adjust accordingly.
* tests/substitute.scm (call-with-narinfo): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-02 22:01:57 +0200'>2019-06-02</span></td><td><a href='/guix/commit/tests/substitute.scm?id=b90ae065b5a5fab4ed475bf2faa3a84476389a02'>substitute: Select the best compression methods.</a><span class='msg-avail'>...<span class='msg-tooltip'>When a server publishes several URLs with different compression methods,
'guix substitute' can now choose the best one among the compression
methods that it supports.

* guix/scripts/substitute.scm (&lt;narinfo&gt;)[uri]: Replace with...
[uris]: ... this.
[compression]: Replace with...
[compressions]: ... this.
[file-size]: Replace with...
[file-sizes]: ... this.
[file-hash]: Replace with...
[file-hashes]: ... this.
(narinfo-maker): Adjust accordingly.  Ensure 'file-sizes' and
'file-hashes' have the right length.
(assert-valid-signature, valid-narinfo?): Use the first element of
'narinfo-uris' in error messages.
(read-narinfo): Expect "URL", "Compression", "FileSize", and "FileHash"
to occur multiple times.
(display-narinfo-data): Call 'select-uri' to determine the file size.
(%compression-methods): New variable.
(supported-compression?, compresses-better?, select-uri): New
procedures.
(process-substitution): Call 'select-uri' to select the URI and
compression.
* guix/scripts/weather.scm (report-server-coverage): Account for all the
values returned by 'narinfo-file-sizes'.
* tests/substitute.scm ("substitute, narinfo with several URLs"): New
test.
</span></span></td><td>Ludovic Courtès</td></tr>