TypeError: sequence item 1: expected string, NoneType found

[Aaron Bentley]

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James Westby wrote:
> On (14/09/07 16:54), Martin Pool wrote:
>> This is https://bugs.launchpad.net/bzr/+bug/120968 "bzr update" in
>> checkout of empty branch fails and breaks dirstate
> ReservedId: Reserved revision-id {null:}
> 
> presumably with Aaron's null: changes.

The error here is correct; if the parent is null, you should do
set_parent_trees([]).

Aaron
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