duplicates:

• SR-12994 Indexing: Assertion failed: (false && "Malformed curry thunk?"), function getUnwrappedCurryThunkExpr

Issue Description:

Compiling John Sundell's Ink package with Swift 5.3 on Linux crashes the compiler as follows:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.3-package-linux-ubuntu-18_04/swift/lib/AST/Expr.cpp:1980: swift::Expr *swift::AutoClosureExpr::getUnwrappedCurryThunkExpr() const: Assertion false && "Malformed curry thunk?"' failed.swift: /home/buildnode/jenkins/workspace/oss-swift-5.3-package-linux-ubuntu-18_04/swift/lib/AST/Expr.cpp:1980: swift::Expr *swift::AutoClosureExpr::getUnwrappedCurryThunkExpr() const: Assertion false && "Malformed curry thunk?"' failed.Stack dump:0. Program arguments: /usr/bin/swift -frontend -c -primary-file /host/Sources/Ink/API/Markdown.swift -primary-file /host/Sources/Ink/API/MarkdownParser.swift -primary-file /host/Sources/Ink/API/Modifier.swift -primary-file /host/Sources/Ink/Internal/Blockquote.swift -primary-file /host/Sources/Ink/Internal/Character+Classification.swift /host/Sources/Ink/Internal/Character+Escaping.swift /host/Sources/Ink/Internal/CodeBlock.swift /host/Sources/Ink/Internal/FormattedText.swift /host/Sources/Ink/Internal/Fragment.swift /host/Sources/Ink/Internal/HTML.swift /host/Sources/Ink/Internal/HTMLConvertible.swift /host/Sources/Ink/Internal/Hashable+AnyOf.swift /host/Sources/Ink/Internal/Heading.swift /host/Sources/Ink/Internal/HorizontalLine.swift /host/Sources/Ink/Internal/Image.swift /host/Sources/Ink/Internal/InlineCode.swift /host/Sources/Ink/Internal/KeyPathPatterns.swift /host/Sources/Ink/Internal/Link.swift /host/Sources/Ink/Internal/List.swift /host/Sources/Ink/Internal/Metadata.swift /host/Sources/Ink/Internal/Modifiable.swift /host/Sources/Ink/Internal/ModifierCollection.swift /host/Sources/Ink/Internal/NamedURLCollection.swift /host/Sources/Ink/Internal/Paragraph.swift /host/Sources/Ink/Internal/PlainTextConvertible.swift /host/Sources/Ink/Internal/Readable.swift /host/Sources/Ink/Internal/Reader.swift /host/Sources/Ink/Internal/Require.swift /host/Sources/Ink/Internal/Substring+Trimming.swift /host/Sources/Ink/Internal/Table.swift /host/Sources/Ink/Internal/TextStyle.swift /host/Sources/Ink/Internal/TextStyleMarker.swift /host/Sources/Ink/Internal/URL.swift /host/Sources/Ink/Internal/URLDeclaration.swift -supplementary-output-file-map /tmp/supplementaryOutputs-4ad1fc -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/.build/x86_64-unknown-linux-gnu/debug -enable-testing -g -module-cache-path /host/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -enable-anonymous-context-mangled-names -parse-as-library -module-name Ink -o /host/.build/x86_64-unknown-linux-gnu/debug/Ink.build/API/Markdown.swift.o -o /host/.build/x86_64-unknown-linux-gnu/debug/Ink.build/API/MarkdownParser.swift.o -o /host/.build/x86_64-unknown-linux-gnu/debug/Ink.build/API/Modifier.swift.o -o /host/.build/x86_64-unknown-linux-gnu/debug/Ink.build/Internal/Blockquote.swift.o -o /host/.build/x86_64-unknown-linux-gnu/debug/Ink.build/Internal/Character+Classification.swift.o -index-store-path /host/.build/x86_64-unknown-linux-gnu/debug/index/store -index-system-modules1. Swift version 5.3 (swift-5.3-RELEASE)2. While walking into decl 'MarkdownParser' (at /host/Sources/Ink/API/MarkdownParser.swift:17:8)3. While walking into body of 'parse(_:)' (at /host/Sources/Ink/API/MarkdownParser.swift:42:12)4. While walking into initializer for declaration 0x8dab668 (at /host/Sources/Ink/API/MarkdownParser.swift:70:17)/usr/bin/swift[0x51f95a4]/usr/bin/swift[0x51f719e]/usr/bin/swift[0x51f987c]/lib/x86_64-linux-gnu/libpthread.so.0(+0x128a0)[0x7f3652a618a0]/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f36510ccf47]/lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f36510ce8b1]/lib/x86_64-linux-gnu/libc.so.6(+0x3042a)[0x7f36510be42a]/lib/x86_64-linux-gnu/libc.so.6(+0x304a2)[0x7f36510be4a2]/usr/bin/swift[0x19404a8]/usr/bin/swift[0x7323de]/usr/bin/swift[0x186bf6b]/usr/bin/swift[0x186bfa1]/usr/bin/swift[0x186d381]/usr/bin/swift[0x186e6b2]/usr/bin/swift[0x186c02b]/usr/bin/swift[0x1870eb9]/usr/bin/swift[0x186beb5]/usr/bin/swift[0x186e87d]/usr/bin/swift[0x186eb0a]/usr/bin/swift[0x186e9f0]/usr/bin/swift[0x186f1bb]/usr/bin/swift[0x186e9f0]/usr/bin/swift[0x1871a08]/usr/bin/swift[0x186beb5]/usr/bin/swift[0x1871138]/usr/bin/swift[0x186beb5]/usr/bin/swift[0x186bdd3]/usr/bin/swift[0x19b133d]/usr/bin/swift[0x7318ef]/usr/bin/swift[0x78492f]/usr/bin/swift[0x784760]/usr/bin/swift[0x77caef]/usr/bin/swift[0x77c5c0]/usr/bin/swift[0x569796]/usr/bin/swift[0x56eb56]/usr/bin/swift[0x5618ec]/usr/bin/swift[0x55eb69]/usr/bin/swift[0x4e8a68]/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f36510afb97]/usr/bin/swift[0x4e860a]

Steps to reproduce:

git clone https://github.com/johnsundell/ink
cd ink
git checkout 0.5.0
docker run --rm -v "$PWD":/host -w /host swift:5.3 swift build