11/05 snapshot使ったら別のコンパイラクラッシュだ

258.7 error: compile command failed due to signal 6 (use -v to see invocation) 258.7 swift-frontend: /home/build-user/swift/lib/AST/TypeSubstitution.cpp:819: swift::TypeSubstitutionMap swift::TypeBase::getContextSubstitutions(const swift::DeclContext *, swift::GenericEnvironment *): Assertion `0 && "Bad base type"' failed. 258.7 Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace. 258.7 Stack dump: