Installing Scala 2.10.2 on Ubuntu 12.04

Question

I am having problems trying to install the .deb file for Scala version 2.10.2.

I am getting the following error:

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Preparing to replace scala 2.9.1.dfsg-3 (using .../Downloads/scala-2.10.2.deb) ...
Unpacking replacement scala ...
dpkg: error processing /home/chris/Downloads/scala-2.10.2.deb (--install):
 trying to overwrite '/usr/share/java/scala-library.jar', which is also in package scala-library 2.9.1.dfsg-3
dpkg-deb (subprocess): data: internal gzip write error: Broken pipe
dpkg-deb (subprocess): failed in write on buffer copy for failed to write to pipe in copy: Broken pipe
dpkg-deb: error: subprocess <decompress> returned error exit status 2
Processing triggers for man-db ...
Errors were encountered while processing:
 /home/chris/Downloads/scala-2.10.2.deb

Do you guys have any idea of why I would be getting this?

Answer 1

/usr/share/java/scala-library.jar is in package scala-library. You must remove both then install the 2.10.2 package:

apt-get remove scala-library scala
dpkg -i  /home/chris/Downloads/scala-2.10.2.deb

In more details, plagiarizing your output log:

1) dpkg is installing a new version of the scala package:

Unpacking replacement scala ...

2) While checking if everything will go well, it realised that if unpacking the scala package, it will replace a file from another package named scala-library:

trying to overwrite '/usr/share/java/scala-library.jar', which is also in package scala-library 2.9.1.dfsg-3

3) It desided to stop before doing bad things.