We are warning about lock acquired in the wrong order because this can create
dead-lock situation. But non-wait acquisition will not block and therefore not
create a dead-lock. So we do not need to wait in such case.
Just displaying the warning makes it quite hard to recognise the guilty code
quickly and using --traceback for all calls is not very convenient. So we
include the call site with all simple message to help developer to recognise
errors sources.
We change the wording of the developer warning:
- "lock" taken before "wlock"
+ "wlock" acquired after "lock"
The goals here are to:
- Put the "subject" as the first word,
- use "acquired" instead of "taken" since it seems more accurate.
Before this change, any call to 'wlock' after we acquired a 'lock' was issuing a
warning. This is wrong as the 'wlock' have been properly acquired before the
'lock' in a previous call.
We move the warning code to only issue such warnings when we are acquiring the
'wlock' -after- acquiring 'lock'. This is the expected behavior of this warning
from the start.
Nobody should start a transaction on an unlocked repository. If
developer warnings are enabled this will be reported. This use the
same config as bad locking order since this is closely related.
