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authorMax Kellermann <max@duempel.org>2014-09-18 17:22:31 +0200
committerMax Kellermann <max@duempel.org>2014-09-18 17:22:31 +0200
commiteeb8d0dbcdc213a430ce00057da061a86804fc7b (patch)
treeb845c35856c9b5752e306a9b64c27a6aab7a1686 /src/db/plugins/ProxyDatabasePlugin.cxx
parent22eb831a71292fb04cdf999e28720da3fd7d2d9e (diff)
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db/proxy: support empty values in VisitUniqueTags()
Workaround for assertion failure in PrintUniqueTag().
Diffstat (limited to 'src/db/plugins/ProxyDatabasePlugin.cxx')
-rw-r--r--src/db/plugins/ProxyDatabasePlugin.cxx9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/db/plugins/ProxyDatabasePlugin.cxx b/src/db/plugins/ProxyDatabasePlugin.cxx
index 8f9d12188..2bd04e3ad 100644
--- a/src/db/plugins/ProxyDatabasePlugin.cxx
+++ b/src/db/plugins/ProxyDatabasePlugin.cxx
@@ -779,6 +779,15 @@ ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection,
(pair = mpd_recv_pair_tag(connection, tag_type2)) != nullptr) {
TagBuilder tag;
tag.AddItem(tag_type, pair->value);
+
+ if (tag.IsEmpty())
+ /* if no tag item has been added, then the
+ given value was not acceptable
+ (e.g. empty); forcefully insert an empty
+ tag in this case, as the caller expects the
+ given tag type to be present */
+ tag.AddEmptyItem(tag_type);
+
result = visit_tag(tag.Commit(), error);
mpd_return_pair(connection, pair);
}