Build Failure on ports-10.7_x86_64: rust, topgrade

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.7_x86_64
Full logs:    https://build.macports.org/builders/ports-10.7_x86_64-watcher/builds/8818
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    topgrade
Subport list:
	- topgrade
Variants:     None
Revision:     f80c98dfc9926b165a5735e40d076dd3e56c9d7c
Build time:   0:02:12
Author:       Lothar Haeger <lothar.haeger at gmx.net>

Log from failed builds:
	Building 'topgrade' ... [ERROR] (failed to install dependency 'rust')
	> maintainers: lothar.haeger at gmx.net,g5pw at macports.org.

Broken ports:
	- rust
	- topgrade

Responsible maintainers:
	- g5pw at macports.org
	- lothar.haeger at gmx.net

Links to individual build jobs:
- ports-10.7_x86_64-builder #27712
  https://build.macports.org/builders/ports-10.7_x86_64-builder/builds/27712

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