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RandomHashTags opened this issue Apr 7, 2025 · 1 comment · Fixed by #80773
Closed

6.1+ compiler crash (Assertion failed: (!operand->getType().isTrivial(getFunction())) #80573

RandomHashTags opened this issue Apr 7, 2025 · 1 comment · Fixed by #80773
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. crash Bug: A crash, i.e., an abnormal termination of software triage needed This issue needs more specific labels

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@RandomHashTags
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Description

Swift's compiler crashes when compiling Destiny (my upcoming networking library). Compiler crashes using the 6.1-RELEASE and main-snapshot-04-03 toolchains when trying to build.

Successfully compiles using 6.0.3.

Reproduction

  1. clone destiny
  2. run swift build using 6.1 or later toolchain
  3. encounter compiler crash

Stack dump

Assertion failed: (!operand->getType().isTrivial(getFunction()) && "Should not be passing trivial values to this api. Use instead " "emitCopyValueOperation"), function createExplicitCopyValue at SILBuilder.h:1460.
(to display assertion configuration options: -Xllvm -assert-help)
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.      Program arguments: /home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend -frontend -c /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Application.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/DestinyDefaults.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/DynamicResponses.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/HTTPRequestHeaders.swift -primary-file /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/HTTPResponseHeaders.swift -primary-file /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Request.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Router.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/RouterGroup.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/RouterResponderStorage.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/commands/BootCommands.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/extensions/SwiftCompressionExtensions.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/DynamicCORSMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/DynamicDateMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/DynamicMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/DynamicRateLimitMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/StaticFileMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/middleware/StaticMiddleware.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/ConditionalRouteResponder.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/DynamicResponse.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/DynamicRoute.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/DynamicRouteResponder.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/StaticErrorResponder.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/StaticRedirectionRoute.swift /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/routes/StaticRoute.swift -emit-dependencies-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/HTTPResponseHeaders.d -emit-reference-dependencies-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/HTTPResponseHeaders.swiftdeps -emit-dependencies-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/Request.d -emit-reference-dependencies-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/Request.swiftdeps -target x86_64-unknown-linux-gnu -disable-objc-interop -I /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/Modules-tool -color-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=4 -module-cache-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -load-plugin-executable /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyUtilityMacros-tool#DestinyUtilityMacros -empty-abi-descriptor -resource-dir /home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/lib/swift -enable-anonymous-context-mangled-names -file-compilation-dir /home/paradigm/Desktop/GitProjects/destiny -Xcc -fmodule-map-file=/home/paradigm/Desktop/GitProjects/destiny/.build/checkouts/swift-syntax/Sources/_SwiftSyntaxCShims/include/module.modulemap -Xcc -I -Xcc /home/paradigm/Desktop/GitProjects/destiny/.build/checkouts/swift-syntax/Sources/_SwiftSyntaxCShims/include -Xcc -fmodule-map-file=/home/paradigm/Desktop/GitProjects/destiny/.build/checkouts/CEpoll/module.modulemap -Xcc -fPIC -Xcc -g -Xcc -fno-omit-frame-pointer -module-name DestinyDefaults -package-name destiny -in-process-plugin-server-path /home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/lib/swift/host/plugins -plugin-path /home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/local/lib/swift/host/plugins -parse-as-library -o /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/HTTPResponseHeaders.swift.o -o /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/DestinyDefaults-tool.build/Request.swift.o -index-store-path /home/paradigm/Desktop/GitProjects/destiny/.build/x86_64-unknown-linux-gnu/debug/index/store -index-system-modules
1.      Swift version 6.1 (swift-6.1-RELEASE)
2.      Compiling with effective version 5.10
3.      While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Request.swift")
4.      While silgen emitFunction SIL function "@$s15DestinyDefaults7RequestV5querySDyS2SGvg".
 for getter for query (at /home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Request.swift:47:21)
5.      While silgen closureexpr SIL function "@$s15DestinyDefaults7RequestV5querySDyS2SGvgAEyXEfU_".
 for expression at [/home/paradigm/Desktop/GitProjects/destiny/Sources/DestinyDefaults/Request.swift:47:47 - line:65:5] RangeText="{
        guard (uri .== .init(repeating: 63)) != .init(repeating: false), // make sure a question mark is present
                let targets:[DestinyRoutePathType] = uri.splitSIMD(separator: 63).get(1)?.splitSIMD(separator: 38) // 63 -> ? | 38 -> &
        else {
            return [:]
        }
        var queries:[String:String] = [:]
        queries.reserveCapacity(targets.count)
        for var key in targets {
            let equalsIndex:Int = key.leadingNonByteCount(byte: 61) // 61 -> =
            var value:DestinyRoutePathType = copy key
            // TODO: shift SIMD right `equalsIndex+1`
            value.keepLeading(value.leadingNonzeroByteCount)

            key.keepLeading(equalsIndex)
            queries[key.leadingString()] = value.stringSIMD()
        }
        return queries
    "
 #0 0x00005f83b3864b18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x7a8eb18)
 #1 0x00005f83b38628fe llvm::sys::RunSignalHandlers() (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x7a8c8fe)
 #2 0x00005f83b38651b8 SignalHandler(int) Signals.cpp:0:0
 #3 0x000078a35384bcd0 (/usr/lib/libc.so.6+0x3dcd0)
 #4 0x000078a3538a5624 __pthread_kill_implementation /usr/src/debug/glibc/glibc/nptl/pthread_kill.c:44:76
 #5 0x000078a35384bba0 raise /usr/src/debug/glibc/glibc/signal/../sysdeps/posix/raise.c:27:6
 #6 0x000078a353833582 abort /usr/src/debug/glibc/glibc/stdlib/abort.c:81:3
 #7 0x00005f83aefc43ab (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x31ee3ab)
 #8 0x00005f83adc2f77b swift::SILBuilder::createExplicitCopyValue(swift::SILLocation, swift::SILValue) LoadableByAddress.cpp:0:0
 #9 0x00005f83adcec08d swift::Lowering::SILGenBuilder::createExplicitCopyValue(swift::SILLocation, swift::Lowering::ManagedValue) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x1f1608d)
#10 0x00005f83add2ef29 (anonymous namespace)::RValueEmitter::visitCopyExpr(swift::CopyExpr*, swift::Lowering::SGFContext) SILGenExpr.cpp:0:0
#11 0x00005f83add2a49b swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) SILGenExpr.cpp:0:0
#12 0x00005f83add1cd4c swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::optional<swift::SILLocation>) SILGenExpr.cpp:0:0
#13 0x00005f83add0a538 swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int, bool) SILGenDecl.cpp:0:0
#14 0x00005f83add10632 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Decl*) SILGenDecl.cpp:0:0
#15 0x00005f83addb2bd5 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) SILGenStmt.cpp:0:0
#16 0x00005f83addb9a90 std::_Function_handler<void (swift::Lowering::ManagedValue, swift::Lowering::SwitchCaseFullExpr&&), (anonymous namespace)::StmtEmitter::visitForEachStmt(swift::ForEachStmt*)::$_0>::_M_invoke(std::_Any_data const&, swift::Lowering::ManagedValue&&, swift::Lowering::SwitchCaseFullExpr&&) SILGenStmt.cpp:0:0
#17 0x00005f83add073b0 swift::Lowering::SwitchEnumBuilder::emit() && (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x1f313b0)
#18 0x00005f83addb8931 (anonymous namespace)::StmtEmitter::visitForEachStmt(swift::ForEachStmt*) SILGenStmt.cpp:0:0
#19 0x00005f83addb2cfb swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) SILGenStmt.cpp:0:0
#20 0x00005f83addb13ad swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) SILGenStmt.cpp:0:0
#21 0x00005f83add47447 swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) SILGenFunction.cpp:0:0
#22 0x00005f83adc99828 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) SILGen.cpp:0:0
#23 0x00005f83adca1ac8 void llvm::function_ref<void ()>::callback_fn<swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&)::$_4>(long) SILGen.cpp:0:0
#24 0x00005f83ae5b0cf7 swift::Lowering::TypeConverter::withClosureTypeInfo(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&, llvm::function_ref<void ()>) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x27dacf7)
#25 0x00005f83adc9c0b8 swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*, swift::Lowering::FunctionTypeInfo const&) SILGen.cpp:0:0
#26 0x00005f83adcceec1 (anonymous namespace)::SILGenApply::visitAbstractClosureExpr(swift::AbstractClosureExpr*) SILGenApply.cpp:0:0
#27 0x00005f83adcb698d swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) SILGenApply.cpp:0:0
#28 0x00005f83add2a5a1 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) SILGenExpr.cpp:0:0
#29 0x00005f83add396e5 (anonymous namespace)::RValueEmitter::visitLazyInitializerExpr(swift::LazyInitializerExpr*, swift::Lowering::SGFContext) SILGenExpr.cpp:0:0
#30 0x00005f83add2a8db swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) SILGenExpr.cpp:0:0
#31 0x00005f83add1cd4c swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::optional<swift::SILLocation>) SILGenExpr.cpp:0:0
#32 0x00005f83add0a538 swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int, bool) SILGenDecl.cpp:0:0
#33 0x00005f83add10632 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Decl*) SILGenDecl.cpp:0:0
#34 0x00005f83addb2bd5 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) SILGenStmt.cpp:0:0
#35 0x00005f83addb13ad swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) SILGenStmt.cpp:0:0
#36 0x00005f83add47224 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) SILGenFunction.cpp:0:0
#37 0x00005f83adc9a837 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) SILGen.cpp:0:0
#38 0x00005f83adc9b311 swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) SILGen.cpp:0:0
#39 0x00005f83adc98e58 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) SILGen.cpp:0:0
#40 0x00005f83addd8682 void llvm::function_ref<void (swift::AccessorDecl*)>::callback_fn<(anonymous namespace)::SILGenType::visitAccessors(swift::AbstractStorageDecl*)::'lambda'(swift::AccessorDecl*)>(long, swift::AccessorDecl*) SILGenType.cpp:0:0
#41 0x00005f83aed4a49f swift::AbstractStorageDecl::visitEmittedAccessors(llvm::function_ref<void (swift::AccessorDecl*)>) const (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x2f7449f)
#42 0x00005f83adc9d5f4 swift::Lowering::SILGenModule::visitEmittedAccessors(swift::AbstractStorageDecl*, llvm::function_ref<void (swift::AccessorDecl*)>) SILGen.cpp:0:0
#43 0x00005f83addd8665 (anonymous namespace)::SILGenType::visitAbstractStorageDecl(swift::AbstractStorageDecl*) SILGenType.cpp:0:0
#44 0x00005f83addd85d9 (anonymous namespace)::SILGenType::visitVarDecl(swift::VarDecl*) SILGenType.cpp:0:0
#45 0x00005f83addd5418 (anonymous namespace)::SILGenType::emitType() SILGenType.cpp:0:0
#46 0x00005f83addd52f8 swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) SILGenType.cpp:0:0
#47 0x00005f83adc9dc93 swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) SILGen.cpp:0:0
#48 0x00005f83adc9e3d0 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x1ec83d0)
#49 0x00005f83addb0d14 std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>> swift::SimpleRequest<swift::ASTLoweringRequest, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::callDerived<0ul>(swift::Evaluator&, std::integer_sequence<unsigned long, 0ul>) const SILGenRequests.cpp:0:0
#50 0x00005f83addb0c39 swift::SimpleRequest<swift::ASTLoweringRequest, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) SILGenRequests.cpp:0:0
#51 0x00005f83adca2657 swift::ASTLoweringRequest::OutputType swift::Evaluator::getResultUncached<swift::ASTLoweringRequest, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()>(swift::ASTLoweringRequest const&, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()) SILGen.cpp:0:0
#52 0x00005f83adc9eb22 swift::performASTLowering(swift::FileUnit&, swift::Lowering::TypeConverter&, swift::SILOptions const&, swift::IRGenOptions const*) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x1ec8b22)
#53 0x00005f83ad5ce88d swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x17f888d)
#54 0x00005f83ad5d11ea performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) FrontendTool.cpp:0:0
#55 0x00005f83ad5d0643 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x17fa643)
#56 0x00005f83ad3ac54a swift::mainEntry(int, char const**) (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x15d654a)
#57 0x000078a353835488 __libc_start_call_main /usr/src/debug/glibc/glibc/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#58 0x000078a35383554c call_init /usr/src/debug/glibc/glibc/csu/../csu/libc-start.c:128:20
#59 0x000078a35383554c __libc_start_main /usr/src/debug/glibc/glibc/csu/../csu/libc-start.c:347:5
#60 0x00005f83ad3ab9a5 _start (/home/paradigm/.local/share/swiftly/toolchains/6.1.0/usr/bin/swift-frontend+0x15d59a5)

Expected behavior

Compilation to succeed.

Environment

Swift
Swift version 6.1 (swift-6.1-RELEASE)
Target: x86_64-unknown-linux-gnu

OS
Arch Linux (6.13.8-arch1-1)

IDE
VS Code (1.98.2)

Swift VS Code extension
2.0.2

Swiftly
1.0.0

Additional information

Crash originates from the https://github.com/RandomHashTags/destiny/blob/008e3a3a425f7e9088874e113ff3066e6655947d/Sources/DestinyDefaults/Request.swift file (query variable):

extension Collection {
    /// - Returns: The element at the given index, if the index is within bounds, otherwise `nil`.
    @usableFromInline
    package func get(_ index: Index) -> Element? {
        return index < endIndex && index >= startIndex ? self[index] : nil
    }
}

typealias DestinyRoutePathType = SIMD64<UInt8>

public let uri:DestinyRoutePathType

public lazy var query : [String:String] = {
        guard (uri .== .init(repeating: 63)) != .init(repeating: false), // make sure a question mark is present
                let targets:[DestinyRoutePathType] = uri.splitSIMD(separator: 63).get(1)?.splitSIMD(separator: 38) // 63 -> ? | 38 -> &
        else {
            return [:]
        }
        var queries:[String:String] = [:]
        queries.reserveCapacity(targets.count)
        for var key in targets {
            let equalsIndex:Int = key.leadingNonByteCount(byte: 61) // 61 -> =
            var value:DestinyRoutePathType = copy key
            // TODO: shift SIMD right `equalsIndex+1`
            value.keepLeading(value.leadingNonzeroByteCount)

            key.keepLeading(equalsIndex)
            queries[key.leadingString()] = value.stringSIMD()
        }
        return queries
    }()

referenced SIMD64<UInt8> function extensions can be found at
@RandomHashTags RandomHashTags added bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. crash Bug: A crash, i.e., an abnormal termination of software triage needed This issue needs more specific labels labels Apr 7, 2025
jckarter added a commit to jckarter/swift that referenced this issue Apr 11, 2025
@jckarter
SILGen: Emit copy x on a trivial value as a trivial copy.
c5188e5 
Avoids an assertion failure emitting an `explicit_copy_value` on the trivial
value, which is unsupported. This allows `copy x` to compile, albeit with
no effect (which is not ideal, but also not a regression, since no-implicit-copy
controls still don't fully work on trivial values). Fixes swiftlang#80573 and rdar://148712387.
@jckarter jckarter mentioned this issue Apr 11, 2025
Merged
@jckarter
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Thanks for the report! #80773 should fix this. You can work around it in the meantime by leaving off the copy on copy key, or if the copy is necessary for explicitly copying a borrowing/consuming parameter binding, maybe you could copy the value by writing let keyCopy = key and then use that copied binding.

jckarter added a commit to jckarter/swift that referenced this issue Apr 11, 2025
@jckarter
SILGen: Emit copy x on a trivial value as a trivial copy.
c0f17ba 
Avoids an assertion failure emitting an `explicit_copy_value` on the trivial
value, which is unsupported. This allows `copy x` to compile, albeit with
no effect (which is not ideal, but also not a regression, since no-implicit-copy
controls still don't fully work on trivial values). Fixes swiftlang#80573 and rdar://148712387.
@jckarter jckarter mentioned this issue Apr 11, 2025
Merged
jckarter added a commit to jckarter/swift that referenced this issue Apr 12, 2025
@jckarter
SILGen: Emit copy x on a trivial value as a trivial copy.
ae09d4d 
Avoids an assertion failure emitting an `explicit_copy_value` on the trivial
value, which is unsupported. This allows `copy x` to compile, albeit with
no effect (which is not ideal, but also not a regression, since no-implicit-copy
controls still don't fully work on trivial values). Fixes swiftlang#80573 and rdar://148712387.
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SILGen: Emit copy x on a trivial value as a trivial copy. jckarter/swift
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@jckarter @RandomHashTags