Build Failure on ports-10.14_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.14_x86_64
Full logs:    https://build.macports.org/builders/ports-10.14_x86_64-watcher/builds/20552
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    R-app
Subport list:
	- R-app
Variants:     None
Revision:     89219a8196212d3adea66d7d807828b939c0ebb0
Build time:   1:09:41
Author:       i0ntempest <szf1234 at me.com>

Log from failed builds:

Links to individual build jobs:
- ports-10.14_x86_64-builder #69754
  https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/69754

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