Subversion Repositories HelenOS

Error running this command: svn --non-interactive --config-dir /tmp log --xml --quiet --limit 40 -r -1:1 'file:///srv/svn/HelenOS/SPARTAN/trunk/arch/mips/src/putchar.c@-1'
No output on STDOUT.E205000: Syntax error in revision argument '-1:1'