Junos: ping: invalid routing instance `RI0'

The following routing instance related error is not a bug, but a configuration mistake:

Here is a routing instance that commits into configuration:

Code:

# show RI_0 
instance-type virtual-router;
interface ge-0/0/7.770;
interface st0.0;
routing-options {
    static {
        route 0.0.0.0/0 next-hop st0.0;
    }
}
# run show route table RI_0.inet.0 

RI_0.inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 00:01:33
                    > via st0.0
11.75.0.0/30       *[Direct/0] 00:01:33
                    > via st0.0
11.75.0.1/32       *[Local/0] 00:01:43
                      Local via st0.0
12.77.0.0/24       *[Direct/0] 00:01:43
                    > via ge-0/0/7.770
12.77.0.1/32       *[Local/0] 00:01:43
                      Local via ge-0/0/7.770

So logically if I try to ping a host in the 12.77.0.0/24 or 11.75.0.0/30 subnets, I should be able to ping them right ? Wrong...

Code:

# run ping 12.77.0.2 routing-instance RI_0                  
ping: invalid routing instance `RI_0'

This because the routing instance needs to be defined as a virtual router:

Code:

# set routing-instances RI_0 instance-type virtual-router
# commit

Now ping can use the routing instance (VRF light - VPN routing and forwarding, but without vpn capabilities, just a simple alternate routing table) .

Code:

# run ping 12.77.0.2 routing-instance RI_0                              
PING 12.77.0.2 (12.77.0.2): 56 data bytes

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Junos: ping: invalid routing instance `RI0'

Junos: ping: invalid routing instance `RI0'