exit status: 4 with stderr:
main/<stdin>:1: Fatal error: Unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.so 0x00007f8d025ef150 swift_reportError + 50 1 libswiftCore.so 0x00007f8d026638f0 _swift_stdlib_reportFatalErrorInFile + 112 2 libswiftCore.so 0x00007f8d02343de6 <unavailable> + 1433062 3 libswiftCore.so 0x00007f8d02343a0f <unavailable> + 1432079 4 libswiftCore.so 0x00007f8d023437ac <unavailable> + 1431468 5 libswiftCore.so 0x00007f8d023432c0 _assertionFailure(_:_:file:line:flags:) + 441 7 swift-frontend 0x0000000000597635 <unavailable> + 1668661 8 swift-frontend 0x000000000056102e <unavailable> + 1445934 9 swift-frontend 0x000000000052c442 <unavailable> + 1229890 10 swift-frontend 0x000000000052baac <unavailable> + 1227436 11 swift-frontend 0x000000000051ee4d <unavailable> + 1175117 12 swift-frontend 0x00000000004b8f78 <unavailable> + 757624 13 libc.so.6 0x00007f8d0462a740 __libc_start_main + 240 14 swift-frontend 0x00000000004b8a49 <unavailable> + 756297 Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build
stderr.txt
https://file.io/KSpVVIQkSIKS