Build Failure on ports-10.15_x86_64: topgrade

[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/4226
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    topgrade
Subport list:
	- topgrade
Variants:     None
Revision:     cb59f1a6ab1e156302f7e769aa2fbf122369d92d
Build time:   0:08:26
Author:       Lothar Haeger <lothar.haeger at gmx.net>

Log from failed builds:
	Building 'topgrade' ... [ERROR]
	> maintainers: lothar.haeger at gmx.net.

Broken ports:
	- topgrade

Responsible maintainers:
	- lothar.haeger at gmx.net

Links to individual build jobs:
- ports-10.15_x86_64-builder #27661
  https://build.macports.org/builders/ports-10.15_x86_64-builder/builds/27661

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