A emoji parameter bug On Linux

[hellomsg]

Platform: Linux(not happen on Mac)
What happen: the server shutdown
How to happen: remove permeter escapeVS, request body is '👨‍👩‍👧‍👦'
Strange: set parameter escapeVS or request not contains '👨‍👩‍👧‍👦', this wouldn't happen.
My question: Is the postParams wrong when the request body contains some speical emoji?

this is my request:

curl --location --request POST 'http://localhost:8181/emoji/parse?a=b' \
--header 'Content-Type: text/plain' \
--data-raw '👨‍👩‍👧‍👦'

this is my code:

func emojiParse(request: HTTPRequest, response: HTTPResponse) {
    do {
        let escapeVS = request.param(name: "escapeVS", defaultValue: "false")?.elementsEqual("true") ?? false
        if let raw = request.postBodyString {
            response.setHeader(.contentType, value: MimeType.forExtension("json"))
            let result = raw.translateUEmojiCode(escapeVS)
            try response.setBody(json: result)
        }
    } catch {
        response.status = .internalServerError
        response.setBody(string: "Error handling request: \(error)")
    }
    response.completed()
}

this is my debug on Mac:

this is the error log:

content:Fatal error: UnsafeMutablePointer.initialize overlapping range: file /home/buildnode/jenkins/workspace/oss-swift-5.2-package-linux-ubuntu-18_04/swift/stdlib/public/core/UnsafePointer.swift, line 832
content:Current stack trace:
content:0    libswiftCore.so                    0x00007fe6d9fc6db0 swift_reportError + 50
content:1    libswiftCore.so                    0x00007fe6da038f60 _swift_stdlib_reportFatalErrorInFile + 115
content:2    libswiftCore.so                    0x00007fe6d9d4d5f5 <unavailable> + 1381877
content:3    libswiftCore.so                    0x00007fe6d9d4d117 <unavailable> + 1380631
content:4    libswiftCore.so                    0x00007fe6d9d4cde3 <unavailable> + 1379811
content:5    libswiftCore.so                    0x00007fe6d9d4c750 _assertionFailure(_:_:file:line:flags:) + 525
content:6    libswiftCore.so                    0x00007fe6d9d4ccb0 _fatalErrorMessage(_:_:file:line:flags:) + 44
content:7    libswiftCore.so                    0x00007fe6d9f6ae72 <unavailable> + 3599986
content:8    PerfectTemplate                    0x0000562ce0eea388 <unavailable> + 992136
content:9    PerfectTemplate                    0x0000562ce0e85404 <unavailable> + 578564
content:10   PerfectTemplate                    0x0000562ce0e82862 <unavailable> + 567394
content:11   PerfectTemplate                    0x0000562ce0e819e3 <unavailable> + 563683
content:12   PerfectTemplate                    0x0000562ce0e5564d <unavailable> + 382541
content:13   PerfectTemplate                    0x0000562ce0f03097 <unavailable> + 1093783
content:14   PerfectTemplate                    0x0000562ce0e6f7c5 <unavailable> + 489413
content:15   PerfectTemplate                    0x0000562ce0e6fda9 <unavailable> + 490921
content:16   PerfectTemplate                    0x0000562ce0e85eb4 <unavailable> + 581300
content:17   PerfectTemplate                    0x0000562ce0ec1159 <unavailable> + 823641
content:18   PerfectTemplate                    0x0000562ce0ebf1bc <unavailable> + 815548
content:19   PerfectTemplate                    0x0000562ce0ec1d77 <unavailable> + 826743
content:20   PerfectTemplate                    0x0000562ce0e812d7 <unavailable> + 561879
content:21   PerfectTemplate                    0x0000562ce0e80e79 <unavailable> + 560761
content:22   PerfectTemplate                    0x0000562ce0ef7df9 <unavailable> + 1048057
content:23   PerfectTemplate                    0x0000562ce0ebee50 <unavailable> + 814672
content:24   PerfectTemplate                    0x0000562ce0ec1bd7 <unavailable> + 826327
content:25   PerfectTemplate                    0x0000562ce0e85cc9 <unavailable> + 580809
content:26   libdispatch.so                     0x00007fe6d8df3487 <unavailable> + 140423
content:27   libdispatch.so                     0x00007fe6d8dfb14a <unavailable> + 172362
content:28   libdispatch.so                     0x00007fe6d8dfaec8 <unavailable> + 171720
content:29   libdispatch.so                     0x00007fe6d8e07993 <unavailable> + 223635
content:30   libpthread.so.0                    0x00007fe6d99e46db <unavailable> + 30427
content:31   libc.so.6                          0x00007fe6d588f850 clone + 63
content:Fatal error: UnsafeMutablePointer.initialize overlapping range: file /home/buildnode/jenkins/workspace/oss-swift-5.2-package-linux-ubuntu-18_04/swift/stdlib/public/core/UnsafePointer.swift, line 832
content:Current stack trace:
content:0    libswiftCore.so                    0x00007fdc837b5db0 swift_reportError + 50
content:1    libswiftCore.so                    0x00007fdc83827f60 _swift_stdlib_reportFatalErrorInFile + 115
content:2    libswiftCore.so                    0x00007fdc8353c5f5 <unavailable> + 1381877
content:3    libswiftCore.so                    0x00007fdc8353c117 <unavailable> + 1380631
content:4    libswiftCore.so                    0x00007fdc8353bde3 <unavailable> + 1379811
content:5    libswiftCore.so                    0x00007fdc8353b750 _assertionFailure(_:_:file:line:flags:) + 525
content:6    libswiftCore.so                    0x00007fdc8353bcb0 _fatalErrorMessage(_:_:file:line:flags:) + 44
content:7    libswiftCore.so                    0x00007fdc83759e72 <unavailable> + 3599986
content:8    PerfectTemplate                    0x000055ebe9e40388 <unavailable> + 992136
content:9    PerfectTemplate                    0x000055ebe9ddb404 <unavailable> + 578564
content:10   PerfectTemplate                    0x000055ebe9dd8862 <unavailable> + 567394
content:11   PerfectTemplate                    0x000055ebe9dd79e3 <unavailable> + 563683
content:12   PerfectTemplate                    0x000055ebe9dab64d <unavailable> + 382541
content:13   PerfectTemplate                    0x000055ebe9e59098 <unavailable> + 1093784
content:14   PerfectTemplate                    0x000055ebe9dc57c5 <unavailable> + 489413
content:15   PerfectTemplate                    0x000055ebe9dc5da9 <unavailable> + 490921
content:16   PerfectTemplate                    0x000055ebe9ddbeb4 <unavailable> + 581300
content:17   PerfectTemplate                    0x000055ebe9e17159 <unavailable> + 823641
content:18   PerfectTemplate                    0x000055ebe9e151bc <unavailable> + 815548
content:19   PerfectTemplate                    0x000055ebe9e17d77 <unavailable> + 826743
content:20   PerfectTemplate                    0x000055ebe9dd72d7 <unavailable> + 561879
content:21   PerfectTemplate                    0x000055ebe9dd6e79 <unavailable> + 560761
content:22   PerfectTemplate                    0x000055ebe9e4ddf9 <unavailable> + 1048057
content:23   PerfectTemplate                    0x000055ebe9e14e50 <unavailable> + 814672
content:24   PerfectTemplate                    0x000055ebe9e17bd7 <unavailable> + 826327
content:25   PerfectTemplate                    0x000055ebe9ddbcc9 <unavailable> + 580809
content:26   libdispatch.so                     0x00007fdc825e2487 <unavailable> + 140423
content:27   libdispatch.so                     0x00007fdc825ea14a <unavailable> + 172362
content:28   libdispatch.so                     0x00007fdc825e9ec8 <unavailable> + 171720
content:29   libdispatch.so                     0x00007fdc825f6993 <unavailable> + 223635
content:30   libpthread.so.0                    0x00007fdc831d36db <unavailable> + 30427
content:31   libc.so.6                          0x00007fdc7f07f6e0 clone + 63
content:Fatal error: UnsafeMutablePointer.initialize overlapping range: file /home/buildnode/jenkins/workspace/oss-swift-5.2-package-linux-ubuntu-18_04/swift/stdlib/public/core/UnsafePointer.swift, line 832
content:Current stack trace:
content:0    libswiftCore.so                    0x00007fbb8658edb0 swift_reportError + 50
content:1    libswiftCore.so                    0x00007fbb86600f60 _swift_stdlib_reportFatalErrorInFile + 115
content:2    libswiftCore.so                    0x00007fbb863155f5 <unavailable> + 1381877
content:3    libswiftCore.so                    0x00007fbb86315117 <unavailable> + 1380631
content:4    libswiftCore.so                    0x00007fbb86314de3 <unavailable> + 1379811
content:5    libswiftCore.so                    0x00007fbb86314750 _assertionFailure(_:_:file:line:flags:) + 525
content:6    libswiftCore.so                    0x00007fbb86314cb0 _fatalErrorMessage(_:_:file:line:flags:) + 44
content:7    libswiftCore.so                    0x00007fbb86532e72 <unavailable> + 3599986
content:8    PerfectTemplate                    0x00005568021bb388 <unavailable> + 992136
content:9    PerfectTemplate                    0x0000556802156404 <unavailable> + 578564
content:10   PerfectTemplate                    0x0000556802153862 <unavailable> + 567394
content:11   PerfectTemplate                    0x00005568021529e3 <unavailable> + 563683
content:12   PerfectTemplate                    0x000055680212664d <unavailable> + 382541
content:13   PerfectTemplate                    0x00005568021d4098 <unavailable> + 1093784
content:14   PerfectTemplate                    0x00005568021407c5 <unavailable> + 489413
content:15   PerfectTemplate                    0x0000556802140da9 <unavailable> + 490921
content:16   PerfectTemplate                    0x0000556802156eb4 <unavailable> + 581300
content:17   PerfectTemplate                    0x0000556802192159 <unavailable> + 823641
content:18   PerfectTemplate                    0x00005568021901bc <unavailable> + 815548
content:19   PerfectTemplate                    0x0000556802192d77 <unavailable> + 826743
content:20   PerfectTemplate                    0x00005568021522d7 <unavailable> + 561879
content:21   PerfectTemplate                    0x0000556802151e79 <unavailable> + 560761
content:22   PerfectTemplate                    0x00005568021c8df9 <unavailable> + 1048057
content:23   PerfectTemplate                    0x000055680218fe50 <unavailable> + 814672
content:24   PerfectTemplate                    0x0000556802192bd7 <unavailable> + 826327
content:25   PerfectTemplate                    0x0000556802156cc9 <unavailable> + 580809
content:26   libdispatch.so                     0x00007fbb853bb487 <unavailable> + 140423
content:27   libdispatch.so                     0x00007fbb853c314a <unavailable> + 172362
content:28   libdispatch.so                     0x00007fbb853c2ec8 <unavailable> + 171720
content:29   libdispatch.so                     0x00007fbb853cf993 <unavailable> + 223635
content:25   PerfectTemplate                    0x0000564fcaa38cc9 <unavailable> + 580809
content:26   libdispatch.so                     0x00007f201bcb2487 <unavailable> + 140423
content:27   libdispatch.so                     0x00007f201bcba14a <unavailable> + 172362
content:28   libdispatch.so                     0x00007f201bcb9ec8 <unavailable> + 171720
content:29   libdispatch.so                     0x00007f201bcc6993 <unavailable> + 223635
content:30   libpthread.so.0                    0x00007f201c8a36db <unavailable> + 30427
content:31   libc.so.6                          0x00007f201874f6e0 clone + 63

--------UPDATE----------

this request also trigger the bug.

curl --location --request POST 'localhost:8181/emoji/parse?escapeVS=false&👨‍👩‍👧‍👦=b' \
--header 'Content-Type: text/plain' \
--data-raw '123xds'

--------UPDATE----------

Looks like a swift unicode bug on Linux?

[hellomsg]

This problem will cause the server shutdown. @kjessup