tree 3ceefc2f79b711c1860b419e0b44f35237c614a0
parent 00e9af9690c1e7d599f1b0e9f8c360ae2983f076
author Benjamin Peterson <benjamin@python.org> 1603225080 -0700
committer Copybara-Service <copybara-worker@google.com> 1603225154 -0700

Flush err after completing standalone jar build request.

Otherwise, diagnostics are eaten.

Closes #12268.

PiperOrigin-RevId: 338123554