Gauche の最新版(?)0.9.11-p1 のビルドでテストがこけるのですが、既知ですか? Testing system ... failed. discrepancies found. Errors are: test sys-sigwait: expects 1 => got #<<system-error> "sigwait failed: Invalid argument"> test sys-sigwait / signal handler restoration: expects foo => got #<undef>#