Strange behavior with Swift 4.1 action

["Burke, Matthew" <Ma...@capitalone.com>]

First, two caveats:


  1.  Perhaps I’m not seeing something simple. I’m confident that’s not the case, but I won’t rule it out.
  2.  I have not tried this on a local install of OpenWhisk---I haven’t yet been able to get that to install properly. I’m using BlueMix if that matters.

I can create and run the following Swift 4 action from the documentation just fine.

         struct Output: Codable {
             let greeting: String
         }

         func main(completion: (Output?, Error?) -> Void) -> Void {
             let result = Output(greeting: "Hello OpenWhisk!")
             completion(result, nil)
         }

However, with a small change, invoking the action yields the following error:  "The action failed to generate or locate a binary. See logs for details."

Here’s the changed code—all I’ve done is added a second string to Output.


         struct Output: Codable {

             let greeting: String

             let extraValue: String

         }



         func main(completion: (Output?, Error?) -> Void) -> Void {

             let result = Output(greeting: "Hello OpenWhisk!", extraValue: "Snafu")

             completion(result, nil)

         }

I’ve included the error log below. But first let me mention that following the steps in the next section of the documentation “Using a script to build Swift packaged action” gives me the same result---i.e. a compiler error.
However, if I copy _Whisk.swift and the other necessary pieces from the script and try to build the action under macOS, it compiles and runs fine.

Here’s the error log. I’ve tried to format it nicely, but it’s still a big wall of text. The essential point (scroll down to the “logs” key)  is that the compiler (swiftc) crashes during IR generation.

Any help would be appreciated!

Thanks,

Matt


Error log from BlueMix dashboard:

{
    "duration":3740,
    "name":"test2",
    "subject":"matthew@bluedino.net",
    "activationId":"7df2e7fa3bdf4984b2e7fa3bdff984a5",
    "publish":false,
    "annotations":[
        {
            "key":"path",
            "value":"bluedinoTrial_dev/test2"
        },
        {
            "key":"waitTime",
            "value":478
        },
        {
            "key":"kind",
            "value":"swift:4.1"
        },
        {
            "key":"limits",
            "value":
            {
                "timeout":60000,
                "memory":256,
                "logs":10
            }
        },
        {
            "key":"initTime",
            "value":3740
        }
    ],
    "version":"0.0.1",
    "response": {
        "result": {
            "error":"The action failed to generate or locate a binary. See logs for details."
        },
        "success":false,
        "status":"action developer error"
    },
    "end":1526045840760,
    "logs":[
       "2018-05-11T13:37:20.759258968Z stdout: Compiling",
        "2018-05-11T13:37:20.759324582Z stdout: swiftc status is 254",
        "2018-05-11T13:37:20.759332521Z stdout: Action did not compile",
        "2018-05-11T13:37:20.759457212Z stderr: swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-14_04/swift/lib/IRGen/IRGenSIL.cpp:1928: void emitApplyArgument((anonymous namespace)::IRGenSILFunction &, swift::SILValue, swift::SILType, swift::irgen::Explosion &): Assertion `arg->getType().isObject()' failed.",
        "2018-05-11T13:37:20.759502143Z stderr: /usr/bin/swift[0x3b78654]",
        "2018-05-11T13:37:20.759509769Z stderr: /usr/bin/swift[0x3b78dc6]",
        "2018-05-11T13:37:20.759516232Z stderr: /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7fa789685330]",
        "2018-05-11T13:37:20.759522369Z stderr: /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37)[0x7fa787e67c37]",
        "2018-05-11T13:37:20.75952814Z  stderr: /lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7fa787e6b028]",
        "2018-05-11T13:37:20.7595339Z   stderr: /lib/x86_64-linux-gnu/libc.so.6(+0x2fbf6)[0x7fa787e60bf6]",
        "2018-05-11T13:37:20.759539616Z stderr: /lib/x86_64-linux-gnu/libc.so.6(+0x2fca2)[0x7fa787e60ca2]",
        "2018-05-11T13:37:20.759545148Z stderr: /usr/bin/swift[0x5c3b7e]",
        "2018-05-11T13:37:20.759550538Z stderr: /usr/bin/swift[0x5c2733]",
        "2018-05-11T13:37:20.75955585Z  stderr: /usr/bin/swift[0x5aa218]",
        "2018-05-11T13:37:20.759561208Z stderr: /usr/bin/swift[0x5a80c6]",
        "2018-05-11T13:37:20.759566503Z stderr: /usr/bin/swift[0x4d4bf5]",
        "2018-05-11T13:37:20.759571901Z stderr: /usr/bin/swift[0x58183d]",
        "2018-05-11T13:37:20.759577191Z stderr: /usr/bin/swift[0x4bb350]",
        "2018-05-11T13:37:20.759582429Z stderr: /usr/bin/swift[0x4b70b1]",
        "2018-05-11T13:37:20.759587623Z stderr: /usr/bin/swift[0x4781e2]",
        "2018-05-11T13:37:20.759593019Z stderr: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7fa787e52f45]",
        "2018-05-11T13:37:20.759598474Z stderr: /usr/bin/swift[0x475d87]",
        "2018-05-11T13:37:20.759603803Z stderr: Stack dump:",
        "2018-05-11T13:37:20.759614908Z stderr: 0.\tProgram arguments: /usr/bin/swift -frontend -c /swift4Action/spm-build/Sources/Action/_Whisk.swift /swift4Action/spm-build/Sources/Action/main.swift -target x86_64-unknown-linux -disable-objc-interop -sdk / -I /swift4Action/spm-build/.build/x86_64-unknown-linux/release -module-cache-path /swift4Action/spm-build/.build/x86_64-unknown-linux/release/ModuleCache -suppress-warnings -swift-version 4 -O -D SWIFT_PACKAGE -emit-module-doc-path /swift4Action/spm-build/.build/x86_64-unknown-linux/release/Action.swiftdoc -module-name Action -emit-module-path /swift4Action/spm-build/.build/x86_64-unknown-linux/release/Action.swiftmodule -emit-dependencies-path /swift4Action/spm-build/.build/x86_64-unknown-linux/release/Action.build/Action.d -num-threads 2 -o /swift4Action/spm-build/.build/x86_64-unknown-linux/release/Action.build/_Whisk.swift.o -o /swift4Action/spm-build/.build/x86_64-unknown-linux/release/Action.build/main.swift.o",
        "2018-05-11T13:37:20.759629514Z stderr: 1.\tWhile emitting IR SIL function \"@main\".",
        "2018-05-11T13:37:20.759635548Z stderr: <unknown>:0: error: unable to execute command: Aborted",
        "2018-05-11T13:37:20.759643511Z stderr: <unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)"
    ],
    "start":1526045837020,
    "namespace":"bluedinoTrial_dev"
}



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