Source: notmuch
Version: 0.29.3-1
Severity: important

Dear Maintainer,

We are planning to start the ruby2.7 transition and your package failed
to build against ruby2.7. Check the full build log here:

https://people.debian.org/~kanashiro/ruby2.7/builds/5/notmuch/notmuch_0.29.3-1+rebuild1580865472_amd64-2020-02-05T01:17:54Z.build

For now, to reproduce the failure locally you need:

* experimental enabled
* ruby-all-dev binary package from experimental (>= 1:2.5.7~0)

For instance, you can use use the following sbuild command:

$ sbuild -d unstable --build-dep-resolver=aptitude
--extra-repository="deb http://deb.debian.org/debian experimental main"
--starting-build-commands="apt install -y ruby-all-dev/experimental"
--source-only-changes

ruby2.7 should be enabled as the default ruby soon in unstable.

-- 
Lucas Kanashiro