Pact keeps outdated interactions in contract JSON

See reproduction steps from https://github.com/pkubowicz/pact-merge

I remove an old interaction and define a new one - with a new description, new endpoint, new expected answer. However, the contract JSON on my disk does not reflect what I have in my test - it keeps the removed interaction.

As a workaround, I always clean pact directory to prevent Pact from doing strange things with already existing files:

test {
    doFirst {
        delete pactOutputDir
    }
}

This however has negative performance implications for Gradle, as described in https://github.com/gradle/gradle/issues/6864#issuecomment-423837703

Can this strange ‘merging’ be fixed as a bug, or can I have a system property to disable it?

[uglyog]

Version 3.6.5 has been released

[uglyog]

Setting the Java system property pact.writer.overwrite to true will now force overwriting the file.