exit status: 134 with stderr:
swift: /home/buildnode/jenkins/workspace/oss-swift-5.1-package-linux-ubuntu-16_04/llvm/include/llvm/Support/Casting.h:255: typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = swift::DependentMemberType, Y = swift::TypeBase]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/OpenCombine/Sources/COpenCombineHelpers/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/COpenCombineHelpers.build/module.modulemap -module-name main -lLibraries 1. While type-checking 'Foo' (at <stdin>:5:1) 2. While validating 'Foo' (at <stdin>:5:1) /usr/bin/swift[0x493d544] /usr/bin/swift[0x493b160] /usr/bin/swift[0x493d968] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f433d746390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f433bc6b428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f433bc6d02a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f433bc63bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f433bc63c82] /usr/bin/swift[0x1447f41] /usr/bin/swift[0x1447cef] /usr/bin/swift[0x1458fb0] /usr/bin/swift[0x144c03f] /usr/bin/swift[0x1470c04] /usr/bin/swift[0x14ce5b9] /usr/bin/swift[0x1455f72] /usr/
stderr.txt
https://file.io/K0ft5N