Build fails on Linux

[Kolos65]

OS: Ubuntu 24.04.2 LTS
Swift version: 5.10.1
swift-issue-reporting version: xctest-dynamic-overlay resolved at 1.5.2

I use swift-issue-reporting in Mockable and my Linux jobs started failing recently with the following errors:

[48/121] Compiling SwiftSyntax AbsolutePosition.swift
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:78:3: error: extraneous code at top level
  ) async -> R? {
  ^~~~~~~~~~~~~~~
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:1:1: error: new Swift parser generated errors for code that C++ parser accepted
/// Evaluates a throwing closure and automatically catches and reports any error thrown.
^
[49/121] Compiling SwiftSyntax AbsoluteRawSyntax.swift
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:78:3: error: extraneous code at top level
  ) async -> R? {
  ^~~~~~~~~~~~~~~
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:1:1: error: new Swift parser generated errors for code that C++ parser accepted
/// Evaluates a throwing closure and automatically catches and reports any error thrown.
^
[50/121] Compiling SwiftSyntax AbsoluteSyntaxInfo.swift
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:78:3: error: extraneous code at top level
  ) async -> R? {
  ^~~~~~~~~~~~~~~
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:1:1: error: new Swift parser generated errors for code that C++ parser accepted
/// Evaluates a throwing closure and automatically catches and reports any error thrown.
^
[51/121] Compiling SwiftSyntax Assert.swift
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:78:3: error: extraneous code at top level
  ) async -> R? {
  ^~~~~~~~~~~~~~~
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:1:1: error: new Swift parser generated errors for code that C++ parser accepted
/// Evaluates a throwing closure and automatically catches and reports any error thrown.
^
[52/121] Compiling SwiftSyntax BumpPtrAllocator.swift
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:78:3: error: extraneous code at top level
  ) async -> R? {
  ^~~~~~~~~~~~~~~
/home/runner/work/Mockable/Mockable/.build/checkouts/xctest-dynamic-overlay/Sources/IssueReporting/ErrorReporting.swift:1:1: error: new Swift parser generated errors for code that C++ parser accepted
/// Evaluates a throwing closure and automatically catches and reports any error thrown.

[stephencelis]

@Kolos65 It seems to build just fine for me. CI against Swift 6 is passing just fine:

https://github.com/pointfreeco/swift-issue-reporting/actions/runs/13486643791/job/37678634661

And when I build against a Docker image of Swift 5.10 locally, it also succeeds:

$ docker run --rm -v "$(PWD):$(PWD)" -w "$(PWD)" swift:5.10-focal bash -c 'swift build'
Building for debugging...
[0/7] Write sources
[3/7] Write swift-version-24593BA9C3E375BF.txt
[5/30] Compiling IssueReporting Unimplemented.swift
[6/30] Compiling IssueReporting WithExpectedIssue.swift
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/WithExpectedIssue.swift:111:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/WithExpectedIssue.swift:274:5: warning: default will never be executed
    @unknown default: break
    ^
[7/31] Compiling IssueReporting WithIssueContext.swift
[8/31] Emitting module IssueReportingTestSupport
[9/31] Compiling IssueReportingTestSupport SwiftTesting.swift
[10/31] Compiling IssueReportingTestSupport XCTest.swift
[11/31] Compiling IssueReporting Deprecations.swift
[12/31] Compiling IssueReporting FailureObserver.swift
[13/31] Compiling IssueReporting LockIsolated.swift
[14/31] Compiling IssueReporting Rethrows.swift
[15/31] Compiling IssueReporting IsTesting.swift
[16/31] Compiling IssueReporting IssueReporter.swift
[17/31] Compiling IssueReporting Warn.swift
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/Internal/Warn.swift:2:19: remark: '@preconcurrency' attribute on module 'Foundation' is unused
  @preconcurrency import Foundation
  ~~~~~~~~~~~~~~~~^
  
[18/31] Compiling IssueReporting XCTest.swift
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/Internal/Warn.swift:2:19: remark: '@preconcurrency' attribute on module 'Foundation' is unused
  @preconcurrency import Foundation
  ~~~~~~~~~~~~~~~~^
  
[19/31] Compiling IssueReporting TestContext.swift
[20/31] Compiling IssueReporting SwiftTesting.swift
[21/31] Compiling IssueReporting UncheckedSendable.swift
[22/31] Compiling IssueReporting BreakpointReporter.swift
[23/31] Compiling IssueReporting FatalErrorReporter.swift
[24/31] Compiling IssueReporting RuntimeWarningReporter.swift
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:79:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:149:3: warning: default will never be executed
  @unknown default: break
  ^
[25/31] Compiling IssueReporting ReportIssue.swift
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:79:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:149:3: warning: default will never be executed
  @unknown default: break
  ^
[26/31] Emitting module IssueReporting
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:79:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/ReportIssue.swift:149:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/WithExpectedIssue.swift:111:3: warning: default will never be executed
  @unknown default: break
  ^
/Users/stephen/Developer/pointfreeco/xctest-dynamic-overlay/Sources/IssueReporting/WithExpectedIssue.swift:274:5: warning: default will never be executed
    @unknown default: break
    ^
[27/31] Compiling IssueReporting ErrorReporting.swift
[28/31] Compiling IssueReporting AppHostWarning.swift
[30/33] Wrapping AST for IssueReportingTestSupport for debugging
[31/33] Write Objects.LinkFileList
[33/36] Compiling XCTestDynamicOverlay Exports.swift
[33/36] Linking libIssueReportingTestSupport.so
[35/36] Emitting module XCTestDynamicOverlay
[36/36] Compiling XCTestDynamicOverlay Deprecations.swift
Build complete! (4.58s)

Can you share a repro of the issue using Docker instructions?