Swift compiler crasher dump - only on linux - swif 4.2

gistfile1.txt

Swift version: Swift version 4.2-dev (LLVM c41d146806, Clang 3ef62dacf4, Swift 57940b7c68)
Target: x86_64-unknown-linux-gnu

swift: /home/buildnode/jenkins/workspace/oss-swift-4.2-package-linux-ubuntu-16_04/swift/lib/SILGen/ManagedValue.cpp:113: void swift::Lowering::ManagedValue::forwardInto(swift::Lowering::SILGenFunction &, swift::SILLocation, swift::SILValue): Assertion `isPlusOne(SGF)' failed.
/usr/bin/swift[0x40fc344]
/usr/bin/swift[0x40fa1d2]
/usr/bin/swift[0x40fc4f2]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fcccbb0f390]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fccca24e428]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fccca25002a]
/lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7fccca246bd7]
/lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7fccca246c82]
/usr/bin/swift[0xd08bac]
/usr/bin/swift[0xc820f7]
/usr/bin/swift[0xce76fe]
/usr/bin/swift[0xcefc92]
/usr/bin/swift[0xcee5e1]
/usr/bin/swift[0xce9803]
/usr/bin/swift[0xced261]
/usr/bin/swift[0xce4d52]
/usr/bin/swift[0xce44f0]
/usr/bin/swift[0xcafa29]
/usr/bin/swift[0xcae616]
/usr/bin/swift[0xc9fad8]
/usr/bin/swift[0xd04793]
/usr/bin/swift[0xc8473f]
/usr/bin/swift[0xd04910]
/usr/bin/swift[0xd2d1a4]
/usr/bin/swift[0xd2b418]
/usr/bin/swift[0xd2acf0]
/usr/bin/swift[0xd169bf]
/usr/bin/swift[0xd15af4]
/usr/bin/swift[0xcaa62d]
/usr/bin/swift[0xc9a3d8]
/usr/bin/swift[0xc89649]
/usr/bin/swift[0xc8977d]
/usr/bin/swift[0xcf69c5]
/usr/bin/swift[0xcf807d]
/usr/bin/swift[0xcf6946]
/usr/bin/swift[0xcf680e]
/usr/bin/swift[0xcc2cfb]
/usr/bin/swift[0xc626d4]
/usr/bin/swift[0xc59ffe]
/usr/bin/swift[0xcffe50]
/usr/bin/swift[0xcffdb8]
/usr/bin/swift[0xc5fb2b]
/usr/bin/swift[0xc6079a]
/usr/bin/swift[0xc60e4d]
/usr/bin/swift[0x4dc081]
/usr/bin/swift[0x4d8f41]
/usr/bin/swift[0x48b0f2]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fccca239830]
/usr/bin/swift[0x487fc9]
Stack dump:
0.	Program arguments: /usr/bin/swift -frontend -c /botengine/Sources/TestKit/FixtureManager.swift -primary-file /botengine/Sources/TestKit/MockGoogleAPIResourceExecutor.swift -emit-module-path /botengine/.build-ubuntu/x86_64-unknown-linux/debug/TestKit.build/MockGoogleAPIResourceExecutor~partial.swiftmodule -emit-module-doc-path /botengine/.build-ubuntu/x86_64-unknown-linux/debug/TestKit.build/MockGoogleAPIResourceExecutor~partial.swiftdoc -emit-dependencies-path /botengine/.build-ubuntu/x86_64-unknown-linux/debug/TestKit.build/MockGoogleAPIResourceExecutor.d -emit-reference-dependencies-path /botengine/.build-ubuntu/x86_64-unknown-linux/debug/TestKit.build/MockGoogleAPIResourceExecutor.swiftdeps -target x86_64-unknown-linux -disable-objc-interop -sdk / -I /botengine/.build-ubuntu/x86_64-unknown-linux/debug -enable-testing -g -module-cache-path /botengine/.build-ubuntu/x86_64-unknown-linux/debug/ModuleCache -swift-version 4 -Onone -D SWIFT_PACKAGE -D DEBUG -color-diagnostics -parse-as-library -module-name TestKit -num-threads 4 -o /botengine/.build-ubuntu/x86_64-unknown-linux/debug/TestKit.build/MockGoogleAPIResourceExecutor.swift.o 
1.	While emitting SIL for 'execute(resource:token:session:deserializer:)' at /botengine/Sources/TestKit/MockGoogleAPIResourceExecutor.swift:20:12
2.	While silgen emitFunction SIL function "@$S7TestKit29MockGoogleAPIResourceExecutorC7execute8resource5token7session12deserializer13ReactiveSwift14SignalProducerVyx0D3APIALC12RequestErrorOGAM8ResourceVy_xG_AM5TokenV10Foundation10URLSessionC6ResultAYOyxAY03AnyR0VGAV4DataV_AV15HTTPURLResponseCtctlF".
 for 'execute(resource:token:session:deserializer:)' at /botengine/Sources/TestKit/MockGoogleAPIResourceExecutor.swift:20:12
3.	While emitting reabstraction thunk in SIL function "@$Ss5Error_p9GoogleAPIABC07RequestA0OIeggo_6Result03AnyA0VAEIeggo_TR".
 for <<debugloc at "<compiler-generated>":0:0>><unknown>:0: error: unable to execute command: Aborted
<unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)