The os.getenv() calls in __init__() that read the log and backtrace
defaults mostly pass None as the explicit default value, but the one
for the show-backtrace environment variable relies on the implicit
default.
Pass None explicitly there as well, so that all the calls read the
same way.
Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v0.84.2
Signed-off-by: Jan Lindemann <jan@janware.com>
Jan Lindemann
d9cc2f3012