Avoid signed overflow during mult-s16-test which intermittently
failed.

Patch by Mark H Weaver <mhw@netris.org>.

--- pulseaudio-5.0/src/tests/mult-s16-test.c.orig	2014-01-23 13:57:55.000000000 -0500
+++ pulseaudio-5.0/src/tests/mult-s16-test.c	2014-10-24 03:13:46.464661815 -0400
@@ -55,7 +55,7 @@
 START_TEST (mult_s16_test) {
     int16_t samples[SAMPLES];
     int32_t volumes[SAMPLES];
-    int32_t sum1 = 0, sum2 = 0;
+    uint32_t sum1 = 0, sum2 = 0;
     int i;
 
     pa_random(samples, sizeof(samples));
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<div class='path'>path: <a href='/guix/log/?id=c9fd3d1b84086b3f0e95e2473fb40248d202bc53'>root</a>/<a href='/guix/log/tests?id=c9fd3d1b84086b3f0e95e2473fb40248d202bc53'>tests</a>/<a href='/guix/log/tests/derivations.scm?id=c9fd3d1b84086b3f0e95e2473fb40248d202bc53'>derivations.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/derivations.scm?id=c9fd3d1b84086b3f0e95e2473fb40248d202bc53&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-09 17:40:54 +0100'>2023-01-09</span></td><td><a href='/guix/commit/tests/derivations.scm?id=407175a1d0e29f45639e7f28a531b3981cd20085'>daemon: Improve error message for wrong hash sizes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libutil/hash.cc (parseHash): Show the hash algorithm name and
expected size in the error message.
* tests/derivations.scm ("fixed-output derivation, invalid hash size"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-01-09 17:40:53 +0100'>2023-01-09</span></td><td><a href='/guix/commit/tests/derivations.scm?id=5d24e57a611b43ff68700379338b899f62d198cc'>derivations: 'read-derivation' correctly handles case with empty hash.</a><span class='msg-avail'>...<span class='msg-tooltip'>Reported by Stephen Paul Weber &lt;singpolyma@singpolyma.net&gt; at
&lt;https://lists.gnu.org/archive/html/guix-devel/2023-01/msg00035.html&gt;.

* guix/derivations.scm (read-derivation)[outputs-&gt;alist]: Treat the
empty hash case as non-fixed-output whether or not the hash algorithm is
the empty string, and preserve the hash algorithm in &lt;derivation-output&gt;.
* tests/derivations.scm ("'download' built-in builder, no fixed-output hash")
("fixed-output-derivation?, no hash", "read-derivation with hash = #f"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-10-22 01:46:55 +0200'>2022-10-22</span></td><td><a href='/guix/commit/tests/derivations.scm?id=a3619079f95213c4f983e69210ed12b38fd31022'>Remove now unnecessary uses of (guix grafts).</a><span class='msg-avail'>...<span class='msg-tooltip'>These modules would use (guix grafts) just to access '%graft?' and
related bindings, which are now in (guix store).

* gnu/ci.scm,
guix/gexp.scm,
guix/lint.scm,
guix/scripts.scm,
guix/scripts/archive.scm,
guix/scripts/build.scm,
guix/scripts/challenge.scm,
guix/scripts/deploy.scm,
guix/scripts/environment.scm,
guix/scripts/home.scm,
guix/scripts/pack.scm,
guix/scripts/package.scm,
guix/scripts/pull.scm,
guix/scripts/size.scm,
guix/scripts/system.scm,
guix/scripts/weather.scm,
tests/builders.scm,
tests/channels.scm,
tests/cpan.scm,
tests/derivations.scm,
tests/gexp.scm,
tests/graph.scm,
tests/guix-daemon.sh,
tests/monads.scm,
tests/pack.scm,
tests/packages.scm,
tests/profiles.scm,
tests/system.scm: Remove #:use-module (guix grafts).
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-07 22:49:27 +0100'>2022-03-07</span></td><td><a href='/guix/commit/tests/derivations.scm?id=1cad3476189d2ce84fabe95b69db8fb85a10b67a'>derivations: Coalesce inputs that have the same output path.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/54209&gt;.

* guix/derivations.scm (coalesce-duplicate-inputs): Use the output paths
of DRV as a hash table key.
* tests/derivations.scm ("derivation with duplicate fixed-output
inputs"): Expect a single input for FINAL.
("derivation with equivalent fixed-output inputs"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>