Opened 14 years ago

Closed 14 years ago

Last modified 14 years ago

#3796 closed defect (fixed)

JOSM lockup when loading duplicate data

Reported by: framm Owned by: hansendc
Priority: normal Milestone:
Component: Core Version: latest
Keywords: Cc:


JOSM (latest - 2328) freezes in the "preparing data set..." stage, emitting lots of

can not split, but too deep: 23 size: 19

messages on the console. This happens when I try to load the following URL:


The data in this area is broken, seven identical imports have been made on top of each other.

PLEASE DO NOT FIX THE DATA, this is being looked after already; it's just that JOSM should handle this gracefully. (Maybe something else is wrong with the data - loading a small section of it does work, just the whole thing doesn't.)

I am attaching a saved version of the above data; the lock-up also happens when opening the file.

Attachments (1)

broken.osm.gz (225.7 KB) - added by framm 14 years ago.
data file that breaks josm

Download all attachments as: .zip

Change History (4)

Changed 14 years ago by framm

Attachment: broken.osm.gz added

data file that breaks josm

comment:1 Changed 14 years ago by stoecker

Owner: changed from team to hansendc

The message comes from QuadBuckets code.

comment:2 Changed 14 years ago by hansendc

Resolution: fixed
Status: newclosed

(In [2423]) This fixes #3796.

The issue was that we somehow ended up with a branch node
that had no valid children. We assumed in the iterator
that any node with no content must have children, but
that was wrong.

comment:3 Changed 14 years ago by anonymous

Thanks for providing the trouble data. It helped finding the bug immensely.

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