py39-pyqt5 fails to (update) build on OS 11

[StanSanderson]

requested py39-pyqt5 update 5.15.6_0 < 5.15.7_0 has failed, with related ports also failing to update for the past week (or two). Using OS 11 Big Sur on iMac, same problem on MacBook Air, also OS 11, same ports installed. I'm 82, code is a mystery- was hoping for the problem to resolve.

Log attached

Following ports are affected: py39-poppler-qt5 21.1.0_0 < 21.1.0_1 py39-pyqt5 5.15.6_0 < 5.15.7_0 py39-pyqt5-webengine 5.15.5_0 < 5.15.6_0 py310-poppler-qt5 21.1.0_0 < 21.1.0_1 py310-pyqt5 5.15.6_0 < 5.15.7_0 py310-pyqt5-webengine 5.15.5_0 < 5.15.6_0