silencer "recreate" does not remember matching with "regex"

[liuzhen]

Bug Report

What did you do?

receate an expired "silencer" with matching of 'regex'

What did you expect to see?
the to be created new silencer have all the properties derived from the old one, including the checked 'regex'

What did you see instead? Under which circumstances?

the 'regex' checkbox is cleared within the matching rule

Environment

• System information:

  Linux 3.10.0-514.el7.x86_64 x86_64

• Prometheus version:

  2.3.2

• Alertmanager version:

  not relevant

• Prometheus configuration file:

insert configuration here

• Alertmanager configuration file:

insert configuration here (if relevant to the issue)

• Logs:

insert Prometheus and Alertmanager logs relevant to the issue here

[simonpasquier]

Thanks for filling the issue! Can you copy the information to https://github.com/prometheus/alertmanager/issues/new instead?

[liuzhen]

sure, my bad.