Progress output contains arrow and box-drawing characters (e.g. the
'[2/6 REFLECT] failure=0->0 groups' line and the banner rules). On a Windows
console that defaults to cp1252, writing them raises UnicodeEncodeError and
kills the process partway through a run -- after rollouts and reflect calls
have already been paid for.
Both entry points now reconfigure stdout/stderr to UTF-8 with errors='replace'
at import time, guarded by hasattr so redirected or exotic streams are left
alone.
Christopher Haugen (from Dev Box)
36d9a9885c