Build Failure on ports-10.6_i386: opencv4

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.6_i386
Full logs:    https://build.macports.org/builders/ports-10.6_i386-watcher/builds/3308
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    py-onnx py-pytorch py-nbval py-path opencv4
Subport list:
	- opencv4
Variants:     None
Revision:     79d6647899aa6575fd4ada516116e945f6ecc50a
Build time:   0:12:07
Author:       Steven Thomas Smith <s.t.smith at ieee.org>

Log from failed builds:
	Building 'opencv4' ... [ERROR]
	> maintainers: stromnov at macports.org.

Broken ports:
	- opencv4

Responsible maintainers:
	- stromnov at macports.org

Links to individual build jobs:
- ports-10.6_i386-builder #7035
  https://build.macports.org/builders/ports-10.6_i386-builder/builds/7035

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