6:755d1e0d79e9 

5:9ce2ce29723a 3:a3e00c7dbf11 4:bb4475edb621 

4:bb4475edb621 1:5d953a1917d1 

3:a3e00c7dbf11 

2:befc7d89d081 

1:5d953a1917d1 

0:837088b6e1d9 

should work with tag/branch/node/rev

tip^: 5

default^: 5

755d1e0d79e9^: 5

6^: 5

some random lookups

6^^: 3

6^^^: 2

6^^^^: 1

6^^^^^: 0

6^^^^^^: -1

6^1: 5

6^2: abort: unknown revision '6^2'!

6^^2: 4

6^1^2: 4

6^^3: abort: unknown revision '6^^3'!

6~: abort: unknown revision '6~'!

6~1: 5

6~2: 3

6~3: 2

6~4: 1

6~5: 0

6~42: -1

6~1^2: 4

6~1^2~2: 0

with a tag "6^" pointing to rev 1

6^: 1

6^1: 5

6~1: 5

6^^: 3

with a tag "foo^bar" pointing to rev 2

foo^bar: 2

foo^bar^: abort: unknown revision 'foo^bar^'!