The Swift server crashed 5 times in the last 3 minutes. The server will not be restarted.

[gkrosl]

I get error from Swift SDE in vscode on linux mint 18.1 (based on ubuntu 16.04 Xenial).

Here is the output copied from vscode:

/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40
for (const m of pkgDesc['modules']) {
^

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
at Socket.sp.stdout.on (/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40:32)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at Pipe.onread (net.js:551:20)
[Info - 11:04:21 AM] Connection to server got closed. Server will restart.
/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40
for (const m of pkgDesc['modules']) {
^

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
at Socket.sp.stdout.on (/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40:32)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at Pipe.onread (net.js:551:20)
[Info - 11:04:22 AM] Connection to server got closed. Server will restart.
/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40
for (const m of pkgDesc['modules']) {
^

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
at Socket.sp.stdout.on (/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40:32)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at Pipe.onread (net.js:551:20)
[Info - 11:04:22 AM] Connection to server got closed. Server will restart.
/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40
for (const m of pkgDesc['modules']) {
^

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
at Socket.sp.stdout.on (/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40:32)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at Pipe.onread (net.js:551:20)
[Info - 11:04:23 AM] Connection to server got closed. Server will restart.
/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40
for (const m of pkgDesc['modules']) {
^

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
at Socket.sp.stdout.on (/home/gorazd/.vscode/extensions/jinmingjian.sde-2.0.20170209/out/src/server/server.js:40:32)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at Pipe.onread (net.js:551:20)
[Error - 11:04:24 AM] Connection to server got closed. Server will not be restarted.

I am using Swift 4.0 however and can't go back to 3.1.

All the best,
Gorazd

[cognition9144]

Same problem

[cognition9144]

This problem disappears when I remove the .build folder.

[gkrosl]

Unfortunately, removing .build folder does not help. I get exactly the same message as posted originally.

[cognition9144]

You're right... This problem shows up again.

[ainopara]

JSON format from swift package describe --type json changed in SwiftPM 4.0
Example to show the new format:

{
  "name": "sourcekite",
  "path": "/Users/ainopara/Documents/Projects/sourcekite",
  "targets": [
    {
      "c99name": "sourcekitd",
      "module_type": "ClangTarget",
      "name": "sourcekitd",
      "path": "/Users/ainopara/Documents/Projects/sourcekite/Sources/sourcekitd",
      "sources": [
        "dummy.c"
      ],
      "type": "library"
    },
    {
      "c99name": "sourcekite",
      "module_type": "SwiftTarget",
      "name": "sourcekite",
      "path": "/Users/ainopara/Documents/Projects/sourcekite/Sources/sourcekite",
      "sources": [
        "main.swift",
        "utils.swift"
      ],
      "type": "executable"
    }
  ]
}

modules is removed, that's why there is error in for (const m of pkgDesc['modules']) {.

You need to add

"swift.path.swift_driver_bin": "path/to/swift3"

in VS Code settings to make sure a SwiftPM from swift 3 is used.
path/to/swift3 can be

• /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift if you have Xcode 8 installed.
• /Users/your-username/.swiftenv/shims/swift if you are using swiftenv and global environment is setted to a swift 3 toolchain.

[renanyoy]

thanks for SDE/sourcekite
for me, all is working except autocomplete and variables watching in debug mode
in debug mode I have only the callstack & breakpoints working..
will be nice to have swiftPM 4 support, it will be a lot easier to setup..

my setup: elementary os (ubuntu 16.04 like), swift 4, sourcekite in docker