Hi,

At v0.16.0-1516-g86228e569 (current master branch head), the
upstream.scm test fails with the following log:

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FAIL: tests/upstream
====================

test-name: coalesce-sources same version
location: /home/marusich/guix/tests/upstream.scm:27
source:
+ (test-equal
+   "coalesce-sources same version"
+   (list (upstream-source
+           (package "foo")
+           (version "1")
+           (urls '("ftp://example.org/foo-1.tar.xz"
+                   "ftp://example.org/foo-1.tar.gz"))
+           (signature-urls
+             '("ftp://example.org/foo-1.tar.xz.sig"
+               "ftp://example.org/foo-1.tar.gz.sig"))))
+   (coalesce-sources
+     (list (upstream-source
+             (package "foo")
+             (version "1")
+             (urls '("ftp://example.org/foo-1.tar.gz"))
+             (signature-urls
+               '("ftp://example.org/foo-1.tar.gz.sig")))
+           (upstream-source
+             (package "foo")
+             (version "1")
+             (urls '("ftp://example.org/foo-1.tar.xz"))
+             (signature-urls
+               '("ftp://example.org/foo-1.tar.xz.sig"))))))
expected-value: (#<<upstream-source> package: "foo" version: "1" urls: ("ftp://example.org/foo-1.tar.xz" "ftp://example.org/foo-1.tar.gz") signature-urls: ("ftp://example.org/foo-1.tar.xz.sig" "ftp://example.org/foo-1.tar.gz.sig") input-changes: #<procedure d8a360 at ice-9/eval.scm:330:13 ()>>)
actual-value: (#<<upstream-source> package: "foo" version: "1" urls: ("ftp://example.org/foo-1.tar.xz" "ftp://example.org/foo-1.tar.gz") signature-urls: ("ftp://example.org/foo-1.tar.xz.sig" "ftp://example.org/foo-1.tar.gz.sig") input-changes: #<procedure db3360 at ice-9/eval.scm:330:13 ()>>)
result: FAIL

random seed for tests: 1548664767
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-- 
Chris