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/991
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-mpld3
Subport list:
	- py38-mpld3
Variants:     None
Revision:     38724cf7158bba617eafadf3a8d4b429bb7518f7
Build time:   0:07:17
Author:       Peter Danecek <peter.danecek at ingv.it>

Log from failed builds:

Links to individual build jobs:
- ports-10.15_x86_64-builder #6795
  https://build.macports.org/builders/ports-10.15_x86_64-builder/builds/6795

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