libc6-dev fails to install

libc6 is 2.24.11+deb9u3 and apt-get install libc6-dev will fail because it depends on 2.24.11+deb9u1. apt-get install libpython2.7-dev will also fail for the same reason.

Related issues

Blocked by #15341 (closed)

Original created by @singuliere on 15383 (Redmine)

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