For the record: Here are the last lines of stdout from the daemon before the crash. The exact query it crashes on appears to be "eåægwærfæ^ø`?´+8(/&2".

(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,237000ms for query: type:Application AND ÆØÆÅÆ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,191000ms for query: type:Application AND ÆØÆÅÆØ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,213000ms for query: type:Application AND ÆØÆÅÆØ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,193000ms for query: type:Application AND ÆØÆÅÆØæøåææ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,217000ms for query: type:Application AND ÆØÆÅÆØæøåææ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,192000ms for query: type:Application AND ÆØÆÅÆØæøåæææ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,222000ms for query: type:Application AND ÆØÆÅÆØæøåæææ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,198000ms for query: type:Application AND ÆØÆÅÆØæøåægærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,221000ms for query: type:Application AND ÆØÆÅÆØæøåægærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,195000ms for query: type:Application AND ÆØÆÅÆØæøåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,220000ms for query: type:Application AND ÆØÆÅÆØæøåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,197000ms for query: type:Application AND ÆØÆÅÆØæøvåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,223000ms for query: type:Application AND ÆØÆÅÆØæøvåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,228000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,801000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,223000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,276000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,256000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,322000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,245000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø`?´
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 0,295000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø`?´
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:521: Global search listed 0 Installed apps in 0,359000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø`?´+8(/&2
(process:2874): unity-applications-daemon-DEBUG: daemon.vala:536: Global search listed 0 Available apps in 2,257000ms for query: type:Application AND ÆØÆÅÆØæøv    eåægwærfæ^ø`?´+8(/&2