suddenly getting error in Heroku deploy only, not locally

[jaysonng]

I pushed my local deployment to Heroku and getting this error on build / compile phase.

[92/959] Compiling ParseSwift API+BatchCommand.swift
/tmp/build_d5e957e8/.build/checkouts/parse-swift/Sources/ParseSwift/Coding/ParseEncoder.swift:860:25: error: 'let' binding pattern cannot appear in an expression
 858 |             }
 859 | 
 860 |         case .formatted(let formatter):
     |                         `- error: 'let' binding pattern cannot appear in an expression
 861 |             return NSString(string: formatter.string(from: date))
 862 | 
[92/959] Compiling tls_method.cc
[92/959] Compiling tls13_server.cc
 !     Push rejected, failed to compile Swift app.
 !     Push failed

It used to be fine. Does anyone know where I can look to get this fixed? Is this a compatibility issue with something specific?

Works perfectly fine locally on my both my local Mac deploy and Docker deploy.

[jaysonng]

This is the full log if it helps.

-----> Building on the Heroku-22 stack
-----> Using buildpack: vapor/vapor
-----> Swift app detected
-----> Using Swift 6.0.1 (default)
-----> Installing swiftenv
-----> Installing Swift 6.0.1
Downloading https://swift.org/builds/swift-6.0.1-release/ubuntu2204/swift-6.0.1-RELEASE/swift-6.0.1-RELEASE-ubuntu22.04.tar.gz
/tmp/swiftenv-6.0.1- /tmp/codon/tmp/buildpacks/2c03c92bc6b8e2a37603d34bfa3d352f037ddcc4
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
/tmp/codon/tmp/buildpacks/2c03c92bc6b8e2a37603d34bfa3d352f037ddcc4
6.0.1 has been installed.
-----> Building package (release configuration, static stdlib)
Fetching https://github.com/netreconlab/parse-swift.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/netreconlab/ParseServerSwift
Fetching https://github.com/lokalnewsapp/Countries
Fetching https://github.com/apple/swift-nio-transport-services.git
Fetching https://github.com/apple/swift-algorithms.git
[1/274] Fetching countries
[275/45703] Fetching countries, parseserverswift
[1184/51266] Fetching countries, parseserverswift, swift-algorithms
[1407/53467] Fetching countries, parseserverswift, swift-algorithms, swift-nio-transport-services
Fetched https://github.com/apple/swift-nio-transport-services.git from cache (0.35s)
Fetching https://github.com/apple/swift-nio-http2.git
[12198/51266] Fetching countries, parseserverswift, swift-algorithms
Fetched https://github.com/apple/swift-algorithms.git from cache (0.40s)
[10269/45703] Fetching countries, parseserverswift
Fetching https://github.com/apple/swift-system.git
[12996/82658] Fetching countries, parseserverswift, parse-swift
[34586/93385] Fetching countries, parseserverswift, parse-swift, swift-nio-http2
[55501/164270] Fetching countries, parseserverswift, parse-swift, swift-nio-http2, swift-nio
[83204/168100] Fetching countries, parseserverswift, parse-swift, swift-nio-http2, swift-nio, swift-system
Fetched https://github.com/apple/swift-system.git from cache (1.30s)
Fetching https://github.com/vapor/multipart-kit.git
[105728/164270] Fetching countries, parseserverswift, parse-swift, swift-nio-http2, swift-nio
[119221/166189] Fetching countries, parseserverswift, parse-swift, swift-nio-http2, swift-nio, multipart-kit
Fetched https://github.com/apple/swift-nio-http2.git from cache (1.56s)
[108609/155462] Fetching countries, parseserverswift, parse-swift, swift-nio, multipart-kit
Fetching https://github.com/apple/swift-metrics.git
[117772/157523] Fetching countries, parseserverswift, parse-swift, swift-nio, multipart-kit, swift-metrics
Fetched https://github.com/apple/swift-metrics.git from cache (0.58s)
Fetching https://github.com/apple/swift-collections.git
[122853/155462] Fetching countries, parseserverswift, parse-swift, swift-nio, multipart-kit
[127120/170932] Fetching countries, parseserverswift, parse-swift, swift-nio, multipart-kit, swift-collections
Fetched https://github.com/apple/swift-collections.git from cache (2.37s)
Fetching https://github.com/apple/swift-numerics.git
Fetched https://github.com/vapor/multipart-kit.git from cache (3.32s)
Fetching https://github.com/apple/swift-http-types
[1/5576] Fetching swift-numerics
[5076/6182] Fetching swift-numerics, swift-http-types
Fetched https://github.com/apple/swift-http-types from cache (0.22s)
Fetching https://github.com/apple/swift-atomics.git
Fetched https://github.com/apple/swift-numerics.git from cache (0.45s)
Fetching https://github.com/vapor/routing-kit.git
[1/20690] Fetching routing-kit
[208/22259] Fetching routing-kit, swift-atomics
Fetched https://github.com/apple/swift-atomics.git from cache (0.57s)
Fetching https://github.com/apple/swift-nio-ssl.git
[16139/20690] Fetching routing-kit
Fetched https://github.com/lokalnewsapp/Countries from cache (6.20s)
Fetching https://github.com/swift-server/async-http-client.git
Fetched https://github.com/vapor/routing-kit.git from cache (0.88s)
Fetching https://github.com/apple/swift-crypto.git
Fetched https://github.com/netreconlab/ParseServerSwift from cache (6.22s)
Fetching https://github.com/vapor/console-kit.git
Fetched https://github.com/apple/swift-nio.git from cache (6.23s)
Fetched https://github.com/netreconlab/parse-swift.git from cache (6.23s)
Fetching https://github.com/apple/swift-nio-extras.git
Fetching https://github.com/vapor/websocket-kit.git
[1/13227] Fetching swift-nio-ssl
[1192/18697] Fetching swift-nio-ssl, console-kit
[1193/23592] Fetching swift-nio-ssl, console-kit, swift-nio-extras
[5007/26072] Fetching swift-nio-ssl, console-kit, swift-nio-extras, websocket-kit
[14698/36431] Fetching swift-nio-ssl, console-kit, swift-nio-extras, websocket-kit, swift-crypto
Fetched https://github.com/vapor/websocket-kit.git from cache (0.20s)
Fetching https://github.com/vapor/async-kit.git
[12793/33951] Fetching swift-nio-ssl, console-kit, swift-nio-extras, swift-crypto
[12794/47071] Fetching swift-nio-ssl, console-kit, swift-nio-extras, swift-crypto, async-http-client
Fetched https://github.com/vapor/console-kit.git from cache (0.28s)
[7456/41601] Fetching swift-nio-ssl, swift-nio-extras, swift-crypto, async-http-client
Fetching https://github.com/apple/swift-log.git
Fetched https://github.com/apple/swift-nio-extras.git from cache (0.27s)
Fetching https://github.com/vapor/vapor.git
[2823/36706] Fetching swift-nio-ssl, swift-crypto, async-http-client
[20134/39076] Fetching swift-nio-ssl, swift-crypto, async-http-client, async-kit
[20428/42699] Fetching swift-nio-ssl, swift-crypto, async-http-client, async-kit, swift-log
Fetched https://github.com/vapor/async-kit.git from cache (0.38s)
[26247/40329] Fetching swift-nio-ssl, swift-crypto, async-http-client, swift-log
[26380/110433] Fetching swift-nio-ssl, swift-crypto, async-http-client, swift-log, vapor
Fetched https://github.com/apple/swift-log.git from cache (0.51s)
[29201/106810] Fetching swift-nio-ssl, swift-crypto, async-http-client, vapor
Fetched https://github.com/swift-server/async-http-client.git from cache (0.94s)
[29698/93690] Fetching swift-nio-ssl, swift-crypto, vapor
Fetched https://github.com/apple/swift-crypto.git from cache (1.77s)
[64403/83331] Fetching swift-nio-ssl, vapor
Fetched https://github.com/apple/swift-nio-ssl.git from cache (2.19s)
[56084/70104] Fetching vapor
Fetched https://github.com/vapor/vapor.git from cache (1.99s)
Creating working copy for https://github.com/netreconlab/ParseServerSwift
Working copy of https://github.com/netreconlab/ParseServerSwift resolved at 0.13.0
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.70.0
Creating working copy for https://github.com/netreconlab/parse-swift.git
Working copy of https://github.com/netreconlab/parse-swift.git resolved at 5.11.2
Creating working copy for https://github.com/lokalnewsapp/Countries
Working copy of https://github.com/lokalnewsapp/Countries resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-nio-transport-services.git
Working copy of https://github.com/apple/swift-nio-transport-services.git resolved at 1.21.0
Creating working copy for https://github.com/apple/swift-algorithms.git
Working copy of https://github.com/apple/swift-algorithms.git resolved at 1.2.0
Creating working copy for https://github.com/apple/swift-nio-http2.git
Working copy of https://github.com/apple/swift-nio-http2.git resolved at 1.34.0
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.3.2
Creating working copy for https://github.com/vapor/multipart-kit.git
Working copy of https://github.com/vapor/multipart-kit.git resolved at 4.7.0
Creating working copy for https://github.com/apple/swift-metrics.git
Working copy of https://github.com/apple/swift-metrics.git resolved at 2.5.0
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.1.2
Creating working copy for https://github.com/apple/swift-numerics.git
Working copy of https://github.com/apple/swift-numerics.git resolved at 1.0.2
Creating working copy for https://github.com/apple/swift-http-types
Working copy of https://github.com/apple/swift-http-types resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.2.0
Creating working copy for https://github.com/vapor/routing-kit.git
Working copy of https://github.com/vapor/routing-kit.git resolved at 4.9.1
Creating working copy for https://github.com/apple/swift-nio-ssl.git
Working copy of https://github.com/apple/swift-nio-ssl.git resolved at 2.27.1
Creating working copy for https://github.com/swift-server/async-http-client.git
Working copy of https://github.com/swift-server/async-http-client.git resolved at 1.22.0
Creating working copy for https://github.com/apple/swift-crypto.git
Working copy of https://github.com/apple/swift-crypto.git resolved at 3.6.1
Creating working copy for https://github.com/vapor/console-kit.git
Working copy of https://github.com/vapor/console-kit.git resolved at 4.14.3
Creating working copy for https://github.com/apple/swift-nio-extras.git
Working copy of https://github.com/apple/swift-nio-extras.git resolved at 1.24.0
Creating working copy for https://github.com/vapor/websocket-kit.git
Working copy of https://github.com/vapor/websocket-kit.git resolved at 2.15.0
Creating working copy for https://github.com/vapor/async-kit.git
Working copy of https://github.com/vapor/async-kit.git resolved at 1.20.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.6.1
Creating working copy for https://github.com/vapor/vapor.git
Working copy of https://github.com/vapor/vapor.git resolved at 4.102.1
warning: 'swift-algorithms': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /tmp/build_d5e957e8/.build/checkouts/swift-algorithms/Sources/Algorithms/Documentation.docc
warning: 'swift-nio-ssl': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /tmp/build_d5e957e8/.build/checkouts/swift-nio-ssl/Sources/NIOSSL/PrivacyInfo.xcprivacy
Building for production...
[0/941] Compiling aes128gcmsiv-x86_64-mac.mac.x86_64.S
[1/941] Compiling a_dup.c
[2/941] Copying PrivacyInfo.xcprivacy
[6/941] Write sources
[7/941] Compiling a_i2d_fp.c
[8/941] Write sources
[8/941] Compiling a_gentm.c
[8/941] Compiling _NumericsShims _NumericsShims.c
[8/941] Write sources
[54/941] Compiling _AtomicsShims.c
[55/941] Compiling pair.c
[56/941] Compiling a_bitstr.c
[57/941] Compiling CNIOWindows shim.c
[58/941] Compiling CNIOWindows WSAStartup.c
[59/941] Compiling CSystem shims.c
[60/941] Compiling CNIOLinux liburing_shims.c
[60/941] Compiling CVaporBcrypt bcrypt.c
[62/941] Compiling CNIOLLHTTP c_nio_http.c
[63/941] Write swift-version-296C55EF043E41F7.txt
[64/941] Compiling CNIOSHA1 c_nio_sha1.c
[65/941] Compiling CNIOLinux shim.c
[66/941] Compiling CNIOExtrasZlib empty.c
[67/941] Compiling CVaporBcrypt blf.c
[68/941] Compiling CNIOLLHTTP c_nio_api.c
[69/946] Compiling c-nioatomics.c
[70/947] Compiling c-atomics.c
[72/947] Compiling _NIOBase64 Base64.swift
[72/949] Compiling CNIOLLHTTP c_nio_llhttp.c
[74/950] Compiling RealModule AlgebraicField.swift
[75/951] Compiling _NIODataStructures Heap.swift
[75/951] Compiling CNIODarwin shim.c
[76/951] Compiling CNIOBoringSSLShims shims.c
[77/951] Compiling fiat_p256_adx_sqr.S
[78/951] Compiling fiat_p256_adx_mul.S
[79/951] Compiling fiat_curve25519_adx_square.S
[80/951] Compiling fiat_curve25519_adx_mul.S
[82/951] Compiling InternalCollectionsUtilities UnsafeMutableBufferPointer+SE-0370.swift
[83/951] Compiling NIOConcurrencyHelpers NIOAtomic.swift
[83/953] Compiling tls_record.cc
[85/954] Compiling CoreMetrics Locks.swift
[86/955] Compiling Logging Locks.swift
[87/956] Compiling HeapModule Heap+Descriptions.swift
[88/957] Compiling Metrics Metrics.swift
[89/958] Compiling SystemPackage Errno.swift
[90/958] Compiling RoutingKit AnyRouter.swift
[91/959] Compiling Countries Countries+Name.swift
[92/959] Compiling ParseSwift API+BatchCommand.swift
/tmp/build_d5e957e8/.build/checkouts/parse-swift/Sources/ParseSwift/Coding/ParseEncoder.swift:860:25: error: 'let' binding pattern cannot appear in an expression
 858 |             }
 859 | 
 860 |         case .formatted(let formatter):
     |                         `- error: 'let' binding pattern cannot appear in an expression
 861 |             return NSString(string: formatter.string(from: date))
 862 | 
[92/959] Compiling tls_method.cc
[92/959] Compiling tls13_server.cc
 !     Push rejected, failed to compile Swift app.
 !     Push failed

[cbaker6]

Thanks for posting your issue. This now being tracked here: netreconlab/parse-server-swift#76

I suspect a workaround for you use a slightly older version of Swift, perhaps using 6.0.0-slim here: https://github.com/netreconlab/parse-server-swift/blob/a6e92bcd1c3354f0b6951e8f0642ad19665f5a9c/Dockerfile#L4 and here: https://github.com/netreconlab/parse-server-swift/blob/a6e92bcd1c3354f0b6951e8f0642ad19665f5a9c/Dockerfile#L50

[jaysonng]

thanks. rolled back to 5.9 and seems to be working on heroku.