Segmentation fault when archiving

[Allan121]

I'm getting a segmentation fault when trying to archive the app if I use any introspection methods. I'm integrating via SPM. Compiled fine otherwise, it's really only when archiving that I run into the issue.

Here's the code that's causing the fault:

ScrollView(.vertical, showsIndicators: self.showScrollIndicator) {
    ...
}
.introspectScrollView { (scrollView) in
    // Commenting this out fixes the issue
}

Here's the stack trace I get during archive:

0  swift                    0x000000010c2ee4ea PrintStackTraceSignalHandler(void*) + 42
1  swift                    0x000000010c2edcc0 SignalHandler(int) + 352
2  libsystem_platform.dylib 0x00007fff7301d5fd _sigtramp + 29
3  libsystem_platform.dylib 0x00007ffee7c5c060 _sigtramp + 1958996608
4  swift                    0x00000001085281c8 (anonymous namespace)::Transform::transform(swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::SGFContext) + 12680
5  swift                    0x0000000108525028 swift::Lowering::SILGenFunction::emitOrigToSubstValue(swift::SILLocation, swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::SGFContext) + 136
6  swift                    0x00000001084a5886 swift::Lowering::Conversion::emit(swift::Lowering::SILGenFunction&, swift::SILLocation, swift::Lowering::ManagedValue, swift::Lowering::SGFContext) const + 710
7  swift                    0x000000010844782d (anonymous namespace)::ScalarResultPlan::finish(swift::Lowering::SILGenFunction&, swift::SILLocation, swift::CanType, llvm::ArrayRef<swift::Lowering::ManagedValue>&) + 1021
8  swift                    0x0000000108462c28 swift::Lowering::SILGenFunction::emitApply(std::__1::unique_ptr<swift::Lowering::ResultPlan, std::__1::default_delete<swift::Lowering::ResultPlan> >&&, swift::Lowering::ArgumentScope&&, swift::SILLocation, swift::Lowering::ManagedValue, swift::SubstitutionMap, llvm::ArrayRef<swift::Lowering::ManagedValue>, swift::Lowering::CalleeTypeInfo const&, swift::Lowering::ApplyOptions, swift::Lowering::SGFContext) + 1784
9  swift                    0x00000001084707bf (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3951
10 swift                    0x000000010846cc47 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 2567
11 swift                    0x00000001084bf223 swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, llvm::Optional<swift::SILLocation>) + 131
12 swift                    0x0000000108543c1d swift::Lowering::SILGenFunction::emitReturnExpr(swift::SILLocation, swift::Expr*) + 845
13 swift                    0x000000010853f2fe swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 12590
14 swift                    0x000000010853c316 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 326
15 swift                    0x00000001084efac0 swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) + 640
16 swift                    0x0000000108458f14 swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*) + 244
17 swift                    0x00000001084d3088 (anonymous namespace)::RValueEmitter::visitAbstractClosureExpr(swift::AbstractClosureExpr*, swift::Lowering::SGFContext) + 40
18 swift                    0x0000000108468afb (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 5243
19 swift                    0x00000001084643b3 (anonymous namespace)::ArgEmitter::emitSingleArg(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 163
20 swift                    0x00000001084766ce (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 238
21 swift                    0x0000000108476549 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus) && + 537
22 swift                    0x0000000108474208 (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>&) + 1032
23 swift                    0x00000001084706b8 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3688
24 swift                    0x000000010846cc47 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 2567
25 swift                    0x00000001084c4b9a swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 22410
26 swift                    0x00000001084bf223 swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, llvm::Optional<swift::SILLocation>) + 131
27 swift                    0x0000000108543c1d swift::Lowering::SILGenFunction::emitReturnExpr(swift::SILLocation, swift::Expr*) + 845
28 swift                    0x000000010853f2fe swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 12590
29 swift                    0x000000010853c316 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 326
30 swift                    0x00000001084eefdf swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 799
31 swift                    0x00000001084551b9 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 953
32 swift                    0x0000000108550a18 void llvm::function_ref<void (swift::AccessorDecl*)>::callback_fn<(anonymous namespace)::SILGenType::visitAccessors(swift::AbstractStorageDecl*)::'lambda'(swift::AccessorDecl*)>(long, swift::AccessorDecl*) + 24
33 swift                    0x000000010855097c (anonymous namespace)::SILGenType::visitVarDecl(swift::VarDecl*) + 1948
34 swift                    0x000000010854d53b (anonymous namespace)::SILGenType::emitType() + 1163
35 swift                    0x000000010845f5e2 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 82
36 swift                    0x000000010845e7ac swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) + 1356
37 swift                    0x000000010846088a swift::SILModule::constructSIL(swift::ModuleDecl*, swift::Lowering::TypeConverter&, swift::SILOptions&, swift::FileUnit*) + 1530
38 swift                    0x00000001080423cb swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 55595
39 swift                    0x0000000107fb84d3 main + 1283
40 libdyld.dylib            0x00007fff72e24cc9 start + 1

[Allan121]

Sorry, just realised this has been raised already in 16.