This is a duplicate. The bug is explained in
https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1451525/comments/3.
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Title:
package
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: curl (Ubuntu)
Status: New => Confirmed
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Title:
** Tags removed: need-duplicate-check
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Title:
package libcurl4-openssl-dev 7.43.0-1ubuntu2 failed to
install/upgrade: trying to overwrite
