how to search for Morse code?

[Gregor Zattler]

Hello,

today I searched for emails containing

-... --- .-. . -.. ..--.. ...-.-

tried with

notmuch search "-... --- .-. . -.. ..--.. ...-.-"

and

notmuch search '-... --- .-. . -.. ..--.. ...-.-'

and even

notmuch search '"-... --- .-. . -.. ..--.. ...-.-"'

and also with double dashes in front of the search term:

notmuch search -- "-... --- .-. . -.. ..--.. ...-.-"


All these searches produce

notmuch search: A Xapian exception occurred
A Xapian exception occurred parsing query: Unknown range operation
Query string was: "-... --- .-. . -.. ..--.. ...-.-"


Is it possible to search for emails containing my supposedly
funny signature?


Obviously this is not much of a problem for me, but perhaps I hit
a hidden bug?


Ciao; Gregor
-- 
 -... --- .-. . -.. ..--.. ...-.-