Build Failure on ports-10.6_x86_64: dovecot2, stack

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_x86_64
Full logs:    https://build.macports.org/builders/ports-10.6_x86_64-watcher/builds/1471
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    dovecot2
Subport list:
	- dovecot2
Variants:     None
Revision:     561af6df7bb7cddce1b16c3b24e94923347cd36a
Build time:   0:01:38
Author:       Steven Thomas Smith <s.t.smith at ieee.org>

Log from failed builds:
	Building 'dovecot2' ... [ERROR] (failed to install dependency 'stack')
	> maintainers: s.t.smith at ieee.org.

Broken ports:
	- dovecot2
	- stack

Responsible maintainers:
	- s.t.smith at ieee.org

Links to individual build jobs:
- ports-10.6_x86_64-builder #7433
  https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/7433

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MacPorts Buildbot
https://build.macports.org/