I want to implement a simple method which makes use of another method from the same generic type Observable<T>, but there is a weird issue which lets Swift 4.2 crash. Since I kind of really need this method to work, I ask for a suggestion how to workaround the issue to stop the compiler from crashing but achieving the same API.
This extension always crashes the compiler or some part of it. The observable type comes from RxSwift library.
extension Observable {
///
struct Expectation : OptionSet {
let rawValue: UInt8
static var noNext: Expectation {
return Expectation(rawValue: 1 << 0)
}
static var noError: Expectation {
return Expectation(rawValue: 1 << 1)
}
static var noCompletion: Expectation {
return Expectation(rawValue: 1 << 2)
}
static var noDispose: Expectation {
return Expectation(rawValue: 1 << 3)
}
}
///
func assert(
_ expectation: Expectation,
message: @escaping @autoclosure () -> String = "",
file: StaticString = #file,
line: UInt = #line
) -> Observable {
//
func _assert(_ value: Expectation) {
if expectation.contains(value) {
assertionFailure(message, file: file, line: line)
}
}
//
return self.do(
onNext: { _ in _assert(.noNext) },
onError: { _ in _assert(.noError) },
onCompleted: { _assert(.noCompletion) },
onSubscribe: nil,
onSubscribed: nil,
onDispose: { _assert(.noDispose) }
)
}
}
Here are the crash logs:
Process: SourceKitService [2556]
Path: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/sourcekitd.framework/Versions/A/XPCServices/SourceKitService.xpc/Contents/MacOS/SourceKitService
Identifier: SourceKitService
Version: 1.0 (1000.11.42)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: com.apple.dt.SKAgent [919]
User ID: 501
Date/Time: 2018-12-11 09:32:33.461 +0100
OS Version: Mac OS X 10.14.2 (18C54)
Report Version: 12
Anonymous UUID: B5B50505-AA2C-1A48-0019-265101F733F0
Time Awake Since Boot: 7400 seconds
System Integrity Protection: enabled
Crashed Thread: 3
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [2556]
VM Regions Near 0x8:
-->
__TEXT 0000000102305000-0000000104ca4000 [ 41.6M] r-x/rwx SM=COW /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/sourcekitd.framework/Versions/A/XPCServices/SourceKitService.xpc/Contents/MacOS/SourceKitService
Application Specific Information:
dyld2 mode
Thread 0:: Dispatch queue: com.apple.root.default-qos.overcommit
0 libsystem_kernel.dylib 0x00007fff64ccf0a2 __sigsuspend_nocancel + 10
1 libdispatch.dylib 0x00007fff64b538b5 _dispatch_sigsuspend + 21
2 libdispatch.dylib 0x00007fff64b538a0 _dispatch_sig_thread + 53
Thread 1:
0 libsystem_pthread.dylib 0x00007fff64d843f8 start_wqthread + 0
1 ??? 0x0000000000000a03 0 + 2563
Thread 2:: Dispatch queue: sourcekit.swift.ASTBuilding
0 libsystem_kernel.dylib 0x00007fff64ccd94e __ulock_wait + 10
1 libsystem_pthread.dylib 0x00007fff64d8970a _pthread_join + 356
2 com.apple.SourceKitService.1000.11.42_osx 0x00000001049b9cfd executeOnLargeStackThread(void*) + 93
3 libdispatch.dylib 0x00007fff64b43dcf _dispatch_client_callout + 8
4 libdispatch.dylib 0x00007fff64b4a124 _dispatch_lane_serial_drain + 618
5 libdispatch.dylib 0x00007fff64b4abdc _dispatch_lane_invoke + 388
6 libdispatch.dylib 0x00007fff64b53090 _dispatch_workloop_worker_thread + 603
7 libsystem_pthread.dylib 0x00007fff64d8460b _pthread_wqthread + 409
8 libsystem_pthread.dylib 0x00007fff64d84405 start_wqthread + 13
Thread 3 Crashed:
0 com.apple.SourceKitService.1000.11.42_osx 0x00000001029fd661 (anonymous namespace)::SILTypeSubstituter::visitType(swift::CanType) + 241
1 com.apple.SourceKitService.1000.11.42_osx 0x00000001029fd803 (anonymous namespace)::SILTypeSubstituter::substSILFunctionType(swift::CanTypeWrapper<swift::SILFunctionType>) + 387
2 com.apple.SourceKitService.1000.11.42_osx 0x00000001029fdec3 swift::SILFunctionType::substGenericArgs(swift::SILModule&, llvm::ArrayRef<swift::Substitution>) + 275
3 com.apple.SourceKitService.1000.11.42_osx 0x00000001025b89d4 (anonymous namespace)::Callee::getTypeInfo(swift::Lowering::SILGenFunction&, bool) const & + 644
4 com.apple.SourceKitService.1000.11.42_osx 0x00000001025c47e5 swift::Lowering::SILGenFunction::emitApplyOfLibraryIntrinsic(swift::SILLocation, swift::FuncDecl*, llvm::ArrayRef<swift::Substitution> const&, llvm::ArrayRef<swift::Lowering::ManagedValue>, swift::Lowering::SGFContext) + 629
5 com.apple.SourceKitService.1000.11.42_osx 0x00000001025c4532 swift::Lowering::SILGenFunction::emitApplyOfLibraryIntrinsic(swift::SILLocation, swift::FuncDecl*, swift::SubstitutionMap const&, llvm::ArrayRef<swift::Lowering::ManagedValue>, swift::Lowering::SGFContext) + 226
6 com.apple.SourceKitService.1000.11.42_osx 0x00000001025f3b33 swift::Lowering::SILGenFunction::emitPointerToPointer(swift::SILLocation, swift::Lowering::ManagedValue, swift::CanType, swift::CanType, swift::Lowering::SGFContext) + 867
7 com.apple.SourceKitService.1000.11.42_osx 0x000000010260dff1 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 22817
8 com.apple.SourceKitService.1000.11.42_osx 0x000000010267ddcb swift::Lowering::SILGenFunction::emitReturnExpr(swift::SILLocation, swift::Expr*) + 491
9 com.apple.SourceKitService.1000.11.42_osx 0x00000001026378d4 swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) + 772
10 com.apple.SourceKitService.1000.11.42_osx 0x00000001025a520d swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*) + 237
11 com.apple.SourceKitService.1000.11.42_osx 0x0000000102618238 (anonymous namespace)::RValueEmitter::visitAbstractClosureExpr(swift::AbstractClosureExpr*, swift::Lowering::SGFContext) + 40
12 com.apple.SourceKitService.1000.11.42_osx 0x00000001025bcacd (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 5293
13 com.apple.SourceKitService.1000.11.42_osx 0x00000001025bd5b2 (anonymous namespace)::ArgEmitter::emitExpanded(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 898
14 com.apple.SourceKitService.1000.11.42_osx 0x00000001025bb6fb (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 219
15 com.apple.SourceKitService.1000.11.42_osx 0x00000001025b9b42 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus) && + 482
16 com.apple.SourceKitService.1000.11.42_osx 0x00000001025b81dd (anonymous namespace)::CallEmission::emitArgumentsForNormalApply(swift::CanTypeWrapper<swift::FunctionType>&, swift::Lowering::AbstractionPattern&, swift::CanTypeWrapper<swift::SILFunctionType>, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::Optional<swift::SILLocation>&, swift::CanTypeWrapper<swift::FunctionType>&) + 1693
17 com.apple.SourceKitService.1000.11.42_osx 0x00000001025b57dd (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3037
18 com.apple.SourceKitService.1000.11.42_osx 0x00000001025b1fa9 swift::Lowering::SILGenFunction::emitApplyExpr(swift::Expr*, swift::Lowering::SGFContext) + 1513
19 com.apple.SourceKitService.1000.11.42_osx 0x000000010261ffc3 swift::Lowering::SILGenFunction::emitIgnoredExpr(swift::Expr*) + 819
20 com.apple.SourceKitService.1000.11.42_osx 0x000000010267a943 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 6547
21 com.apple.SourceKitService.1000.11.42_osx 0x000000010267c4e3 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 13619
22 com.apple.SourceKitService.1000.11.42_osx 0x000000010267a8e7 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 6455
23 com.apple.SourceKitService.1000.11.42_osx 0x0000000102636dde swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 462
24 com.apple.SourceKitService.1000.11.42_osx 0x00000001025a24d4 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*)::$_1::operator()(swift::SILFunction*) const + 516
25 com.apple.SourceKitService.1000.11.42_osx 0x00000001025a1802 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 1042
26 com.apple.SourceKitService.1000.11.42_osx 0x000000010267a98b swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 6619
27 com.apple.SourceKitService.1000.11.42_osx 0x0000000102636dde swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 462
28 com.apple.SourceKitService.1000.11.42_osx 0x00000001025a24d4 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*)::$_1::operator()(swift::SILFunction*) const + 516
29 com.apple.SourceKitService.1000.11.42_osx 0x00000001025a1802 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 1042
30 com.apple.SourceKitService.1000.11.42_osx 0x00000001025ac334 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 276
31 com.apple.SourceKitService.1000.11.42_osx 0x00000001025ab25b swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*, unsigned int) + 971
32 com.apple.SourceKitService.1000.11.42_osx 0x00000001025ad0fe swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*, llvm::Optional<unsigned int>, bool) + 1310
33 com.apple.SourceKitService.1000.11.42_osx 0x0000000102343282 void SourceKit::WorkQueue::DispatchData::callAndDelete<(anonymous namespace)::ASTProducer::getASTUnitAsync(SourceKit::SwiftASTManager::Implementation&, llvm::ArrayRef<llvm::IntrusiveRefCntPtr<SourceKit::ImmutableTextSnapshot> >, std::__1::function<void (llvm::IntrusiveRefCntPtr<SourceKit::ASTUnit>, llvm::StringRef)>)::$_3>(void*) + 10674
34 libdispatch.dylib 0x00007fff64b43dcf _dispatch_client_callout + 8
35 libdispatch.dylib 0x00007fff64b46b6c _dispatch_block_invoke_direct + 260
36 com.apple.SourceKitService.1000.11.42_osx 0x00000001049b9d1f executeBlock(void*) + 15
37 com.apple.SourceKitService.1000.11.42_osx 0x000000010243d6bd ExecuteOnThread_Dispatch(void*) + 13
38 libsystem_pthread.dylib 0x00007fff64d85305 _pthread_body + 126
39 libsystem_pthread.dylib 0x00007fff64d8826f _pthread_start + 70
40 libsystem_pthread.dylib 0x00007fff64d84415 thread_start + 13
Thread 3 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x00007fd8c5b04100 rcx: 0x00007fd8c7b438f8 rdx: 0x00007fd8c5b04100
rdi: 0x0000000000000600 rsi: 0x0000000000000200 rbp: 0x00007000098b37a0 rsp: 0x00007000098b3700
r8: 0x0000000000000007 r9: 0x00007fd8c7b438f8 r10: 0x00007fd8c5b04100 r11: 0x00007fd8c7b43b78
r12: 0x00007000098b3750 r13: 0x0000000000000008 r14: 0x00007000098b3980 r15: 0x00007fd8c7b43b78
rip: 0x00000001029fd661 rfl: 0x0000000000010206 cr2: 0x0000000000000008
Logical CPU: 2
Error Code: 0x00000004
Trap Number: 14
Binary Images:
0x102305000 - 0x104ca3ff3 com.apple.SourceKitService.1000.11.42_osx (1.0 - 1000.11.42) <C77BBCF5-1622-392B-BF6B-D11E0F5A51DD> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/sourcekitd.framework/Versions/A/XPCServices/SourceKitService.xpc/Contents/MacOS/SourceKitService
0x109378000 - 0x1093f6a67 dyld (640.2) <289AB27E-F09F-3384-A14A-100431139559> /usr/lib/dyld
0x7fff62006000 - 0x7fff62007ffb libSystem.B.dylib (1252.200.5) <25F4A1F5-6551-312F-B397-C8D45ACC530A> /usr/lib/libSystem.B.dylib
0x7fff62260000 - 0x7fff622b7ff7 libc++.1.dylib (400.9.4) <B260AC33-EB9A-30C6-8746-D011B3B02B08> /usr/lib/libc++.1.dylib
0x7fff622b8000 - 0x7fff622cdfff libc++abi.dylib (400.17) <446F4748-8A89-3D2E-AE1C-27EEBE93A8AB> /usr/lib/libc++abi.dylib
0x7fff634f1000 - 0x7fff63521ff7 libncurses.5.4.dylib (53.200.3) <2B715386-F391-3835-909F-A6DD86DCB4E3> /usr/lib/libncurses.5.4.dylib
0x7fff63aad000 - 0x7fff64233fe7 libobjc.A.dylib (750.1) <804715F4-F52D-34D0-8FEC-A25DC08513C3> /usr/lib/libobjc.A.dylib
0x7fff64990000 - 0x7fff649a2ffb libz.1.dylib (70.200.4) <15F7B40A-424C-33BB-BF2C-7E8195128B78> /usr/lib/libz.1.dylib
0x7fff64a13000 - 0x7fff64a17ff3 libcache.dylib (81) <704331AC-E43D-343A-8C24-39201142AF27> /usr/lib/system/libcache.dylib
0x7fff64a18000 - 0x7fff64a22ff3 libcommonCrypto.dylib (60118.220.1) <9C865644-EE9A-3662-AB77-7C8A5E561784> /usr/lib/system/libcommonCrypto.dylib
0x7fff64a23000 - 0x7fff64a2afff libcompiler_rt.dylib (63.4) <817772E3-E836-3FFD-A39B-BDCD1C357221> /usr/lib/system/libcompiler_rt.dylib
0x7fff64a2b000 - 0x7fff64a34ff3 libcopyfile.dylib (146.200.3) <5C5C4F35-DAB7-3CF1-940F-F47192AB8289> /usr/lib/system/libcopyfile.dylib
0x7fff64a35000 - 0x7fff64ab9fdf libcorecrypto.dylib (602.230.1) <C78D1A87-5543-3561-BEB4-3B480BA94ECB> /usr/lib/system/libcorecrypto.dylib
0x7fff64b40000 - 0x7fff64b7aff7 libdispatch.dylib (1008.220.2) <2FDB1401-5119-3DF0-91F5-F4E105F00CD7> /usr/lib/system/libdispatch.dylib
0x7fff64b7b000 - 0x7fff64baaff3 libdyld.dylib (640.2) <376E3F3A-6942-3B0E-AD5E-4B97E8255CF5> /usr/lib/system/libdyld.dylib
0x7fff64bab000 - 0x7fff64babffb libkeymgr.dylib (30) <A4EFD9A4-2EF3-3E18-B325-F527E3821939> /usr/lib/system/libkeymgr.dylib
0x7fff64bb9000 - 0x7fff64bb9ff7 liblaunch.dylib (1336.220.5) <8563299C-2493-3DBD-8E88-3FC673DB47DD> /usr/lib/system/liblaunch.dylib
0x7fff64bba000 - 0x7fff64bbffff libmacho.dylib (921) <6ADB99F3-D142-3A0A-B3CE-031354766ACC> /usr/lib/system/libmacho.dylib
0x7fff64bc0000 - 0x7fff64bc2ffb libquarantine.dylib (86.220.1) <58524FD7-63C5-38E0-9D90-845A79551C14> /usr/lib/system/libquarantine.dylib
0x7fff64bc3000 - 0x7fff64bc4ff3 libremovefile.dylib (45.200.2) <BA53CA8A-9974-3A43-9265-B110B1AE470F> /usr/lib/system/libremovefile.dylib
0x7fff64bc5000 - 0x7fff64bdcff3 libsystem_asl.dylib (356.200.4) <33C62769-1242-3BC1-9459-13CBCDECC7FE> /usr/lib/system/libsystem_asl.dylib
0x7fff64bdd000 - 0x7fff64bddfff libsystem_blocks.dylib (73) <152EDADF-7D94-35F2-89B7-E66DCD945BBA> /usr/lib/system/libsystem_blocks.dylib
0x7fff64bde000 - 0x7fff64c66fff libsystem_c.dylib (1272.200.26) <D6C701A2-9F17-308D-B6AC-9E17EF31B7DF> /usr/lib/system/libsystem_c.dylib
0x7fff64c67000 - 0x7fff64c6aff7 libsystem_configuration.dylib (963.200.27) <94898525-ECC8-3CC9-B312-CBEAAC305E32> /usr/lib/system/libsystem_configuration.dylib
0x7fff64c6b000 - 0x7fff64c6eff7 libsystem_coreservices.dylib (66) <10818C17-70E1-328E-A3E3-C3EB81AEC590> /usr/lib/system/libsystem_coreservices.dylib
0x7fff64c6f000 - 0x7fff64c75ffb libsystem_darwin.dylib (1272.200.26) <07468CF7-982F-37C4-83D0-D5E602A683AA> /usr/lib/system/libsystem_darwin.dylib
0x7fff64c76000 - 0x7fff64c7cff7 libsystem_dnssd.dylib (878.230.2) <FF9D5025-F060-334B-B6D8-C5D0BB6A55E3> /usr/lib/system/libsystem_dnssd.dylib
0x7fff64c7d000 - 0x7fff64cc9ff3 libsystem_info.dylib (517.200.9) <54B65F21-2E93-3579-9B72-6637A03245D9> /usr/lib/system/libsystem_info.dylib
0x7fff64cca000 - 0x7fff64cf2ff7 libsystem_kernel.dylib (4903.231.4) <ABDAABCA-C22A-3960-AA4E-E91A9FF34929> /usr/lib/system/libsystem_kernel.dylib
0x7fff64cf3000 - 0x7fff64d3eff7 libsystem_m.dylib (3158.200.7) <AF25F8E8-194C-314F-A2D3-A424853EE796> /usr/lib/system/libsystem_m.dylib
0x7fff64d3f000 - 0x7fff64d63ff7 libsystem_malloc.dylib (166.220.1) <4777DC06-F9C6-356E-82AB-86A1C6D62F3A> /usr/lib/system/libsystem_malloc.dylib
0x7fff64d64000 - 0x7fff64d6fff3 libsystem_networkextension.dylib (767.220.1) <74818C3D-9B68-3823-A737-6A4B782618F2> /usr/lib/system/libsystem_networkextension.dylib
0x7fff64d70000 - 0x7fff64d77fff libsystem_notify.dylib (172.200.21) <65B3061D-41D7-3485-B217-A861E05AD50B> /usr/lib/system/libsystem_notify.dylib
0x7fff64d78000 - 0x7fff64d81fef libsystem_platform.dylib (177.200.16) <83DED753-51EC-3B8C-A98D-883A5184086B> /usr/lib/system/libsystem_platform.dylib
0x7fff64d82000 - 0x7fff64d8cfff libsystem_pthread.dylib (330.230.1) <BA382BFC-6A17-3940-B417-D090EF2AF4F4> /usr/lib/system/libsystem_pthread.dylib
0x7fff64d8d000 - 0x7fff64d90ff7 libsystem_sandbox.dylib (851.230.3) <4D0CB1CA-160C-3C29-BE5D-131D68D43B1B> /usr/lib/system/libsystem_sandbox.dylib
0x7fff64d91000 - 0x7fff64d93ff3 libsystem_secinit.dylib (30.220.1) <5964B6D2-19D4-3CF9-BDBC-4EB1D42348F1> /usr/lib/system/libsystem_secinit.dylib
0x7fff64d94000 - 0x7fff64d9bff7 libsystem_symptoms.dylib (820.237.2) <487E1794-4C6E-3B1B-9C55-95B1A5FF9B90> /usr/lib/system/libsystem_symptoms.dylib
0x7fff64d9c000 - 0x7fff64db1ff7 libsystem_trace.dylib (906.220.1) <4D4BA88A-FA32-379D-8860-33838723B35F> /usr/lib/system/libsystem_trace.dylib
0x7fff64db3000 - 0x7fff64db8ffb libunwind.dylib (35.4) <EF1A77FD-A86B-39F5-ABEA-6100AB23583A> /usr/lib/system/libunwind.dylib
0x7fff64db9000 - 0x7fff64de9fff libxpc.dylib (1336.220.5) <DC50F33E-C47D-3256-BFE0-F8E9B5AEBE17> /usr/lib/system/libxpc.dylib
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 4431
thread_create: 0
thread_set_state: 214
VM Region Summary:
ReadOnly portion of Libraries: Total=274.8M resident=0K(0%) swapped_out_or_unallocated=274.8M(100%)
Writable regions: Total=125.1M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=125.1M(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Activity Tracing 256K 2
Dispatch continuations 16.0M 2
Kernel Alloc Once 8K 2
MALLOC 99.0M 27
MALLOC guard page 16K 5
STACK GUARD 16K 5
Stack 9768K 6
Stack Guard 64.0M 3
VM_ALLOCATE (reserved) 256K 2 reserved VM address space (unallocated)
__DATA 3624K 43
__LINKEDIT 221.2M 4
__TEXT 53.6M 42
mapped file 70.4M 58
shared memory 12K 4
=========== ======= =======
TOTAL 537.8M 191
TOTAL, minus reserved VM space 537.6M 191
I'll file a bug report later today.
And it's something that I have reported in the past. 
The compiler crashed because I attempted to 'forward' an escaping autoclosure to another function that takes an escaping autoclosure. Calling explicitly the function