Build Failure on ports-10.6_i386_legacy

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_i386_legacy
Full logs:    https://build.macports.org/builders/ports-10.6_i386_legacy-watcher/builds/25932
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    protobuf-c
Subport list:
	- protobuf-c
Variants:     None
Revision:     1233ac1aeba7469d5cb26e88e141afe965fcf101
Build time:   0:04:55
Author:       Chih-Hsuan Yen <yan12125 at macports.org>

Log from failed builds:
	Fetching 'protobuf-c' ... [ERROR]
	> maintainers: .

Links to individual build jobs:
- ports-10.6_i386_legacy-builder #66984
  https://build.macports.org/builders/ports-10.6_i386_legacy-builder/builds/66984

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