Build Failure on ports-10.11_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.11_x86_64
Full logs:    https://build.macports.org/builders/ports-10.11_x86_64-watcher/builds/18605
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    crystal
Subport list:
	- crystal
Variants:     None
Revision:     ff5e8b798a37ff3f37e484f24145b5597a14a1f5
Build time:   0:03:22
Author:       Mohamed Akram <mohd.akram at outlook.com>

Log from failed builds:
	Fetching 'crystal' ... [ERROR]
	> maintainers: mohd.akram at outlook.com.

Links to individual build jobs:
- ports-10.11_x86_64-builder #66427
  https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/66427

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