Build Failure on ports-10.15_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.15_x86_64
Full logs:    https://build.macports.org/builders/ports-10.15_x86_64-watcher/builds/4880
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    llvm-7.0 llvm-3.7 llvm-6.0 llvm-devel llvm-8.0 llvm-9.0 llvm-5.0 llvm-10
Subport list:
	- clang-3.7
Variants:     None
Revision:     2071c79f088d70040eafdf34546e461473af7072
Build time:   0:02:36
Author:       Ken Cunningham <kencu at macports.org>

Log from failed builds:
	Fetching 'clang-3.7' ... [ERROR]
	> maintainers: jeremyhu at macports.org,larryv at macports.org,kencu at macports.org.

Links to individual build jobs:
- ports-10.15_x86_64-builder #29573
  https://build.macports.org/builders/ports-10.15_x86_64-builder/builds/29573

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