[GitHub] csantanapr commented on issue #60: Swift 4.1 issue discovered around Structs with two Strings

[GitBox <gi...@apache.org>]

csantanapr commented on issue #60: Swift 4.1 issue discovered around Structs with two Strings
URL: https://github.com/apache/incubator-openwhisk-runtime-swift/issues/60#issuecomment-389019758
 
 
   Create the two following files
   ```
   ./Package.swift
   ./Sources/Action/main.swift
   ```
   Content of `Package.swift`
   ```swift
   // swift-tools-version:4.0
   // The swift-tools-version declares the minimum version of Swift required to build this package.
   
   import PackageDescription
   
   let package = Package(
       name: "Action",
       products: [
         .executable(
           name: "Action",
           targets:  ["Action"]
         )
       ],
       targets: [
         .target(
           name: "Action"
         )
       ]
   )
   
   ```
   Create `Sources/Action/main.swift`
   ```swift
   import Foundation
   func _run_main<Out: Encodable>(mainFunction: ( @escaping (Out?, Error?) -> Void) -> Void) {
       let resultHandler = { (out: Out?, error: Error?) in
           let encoder = JSONEncoder()
           do {
               let jsonData = try encoder.encode(out)
               let jsonString = String(data: jsonData, encoding: .utf8)
               print("\(jsonString!)")
           } catch {
               print("{\"error\":\"Error encoding result\"}")
           }
       }
       let _ = mainFunction(resultHandler)
   }
   struct Output: Codable {
       let greeting: String
       let group: String
   }
   func main(completion: (Output?, Error?) -> Void) -> Void {
       let result = Output(greeting: "Hello OpenWhisk!", group: "Avoid")
       completion(result, nil)
   }
   _run_main(mainFunction:main)
   ```
   
   
   Use Swift Docker image to compile
   ```
   docker run --rm -it -v $(pwd):/owexec swift:4.1 bash
   root@15fe743675c1:/# cd /owexec
   ```
   Try to compile in debug mode 
   ```
   root@15fe743675c1:/owexec# swift build
   Compile Swift Module 'Action' (1 sources)
   Linking ./.build/x86_64-unknown-linux/debug/Action
   ```
   As you can see no issues
   Then try to compile in release mode
   ```
   root@15fe743675c1:/owexec# swift build -c release
   Compile Swift Module 'Action' (1 sources)
   swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-16_04/swift/lib/IRGen/IRGenSIL.cpp:1928: void emitApplyArgument((anonymous namespace)::IRGenSILFunction &, swift::SILValue, swift::SILType, swift::irgen::Explosion &): Assertion `arg->getType().isObject()' failed.
   /usr/bin/swift[0x3f24d54]
   /usr/bin/swift[0x3f25096]
   /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f721a60d390]
   /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f7218d4c428]
   /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f7218d4e02a]
   /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f7218d44bd7]
   /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f7218d44c82]
   /usr/bin/swift[0x5f2bd1]
   /usr/bin/swift[0x5f1873]
   /usr/bin/swift[0x5d6202]
   /usr/bin/swift[0x5d3cfb]
   /usr/bin/swift[0x4e5ae5]
   /usr/bin/swift[0x5ac229]
   /usr/bin/swift[0x4c3780]
   /usr/bin/swift[0x4beecc]
   /usr/bin/swift[0x4778c4]
   /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f7218d37830]
   /usr/bin/swift[0x475179]
   Stack dump:
   0.	Program arguments: /usr/bin/swift -frontend -c /owexec/Sources/Action/main.swift -target x86_64-unknown-linux -disable-objc-interop -sdk / -I /owexec/.build/x86_64-unknown-linux/release -module-cache-path /owexec/.build/x86_64-unknown-linux/release/ModuleCache -swift-version 4 -O -D SWIFT_PACKAGE -color-diagnostics -emit-module-doc-path /owexec/.build/x86_64-unknown-linux/release/Action.swiftdoc -module-name Action -emit-module-path /owexec/.build/x86_64-unknown-linux/release/Action.swiftmodule -emit-dependencies-path /owexec/.build/x86_64-unknown-linux/release/Action.build/Action.d -num-threads 4 -o /owexec/.build/x86_64-unknown-linux/release/Action.build/main.swift.o
   1.	While emitting IR SIL function "@main".
   <unknown>:0: error: unable to execute command: Aborted
   <unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)
   error: terminated(1): /usr/bin/swift-build-tool -f /owexec/.build/release.yaml main output:
   ```
   
   Now try to workaround by compiling with Optimization off, and compiles with no errors 
   ```
   root@15fe743675c1:/owexec# swift build -c release -Xswiftc -Onone
   Compile Swift Module 'Action' (1 sources)
   Linking ./.build/x86_64-unknown-linux/release/Action
   ```
   
   
   

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