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/13602
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    swi-prolog-devel
Subport list:
	- swi-prolog-devel
Variants:     None
Revision:     d61308df232768bebd714e6626a6d2581db1d8fd
Build time:   1:08:49
Author:       Paulo Moura <pmoura at logtalk.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.14_x86_64-builder #53932
  https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/53932

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