Error: no such module '_SwiftDispatchOverlayShims'

Development Compiler
1

During swift build on linux, a compilation error occurs periodically:

<unknown>:0: warning: missing submodule '_SwiftDispatchOverlayShims'
..../swift-5.1.5/swift-corelibs-libdispatch/src/swift/Block.swift:14:8: error: no such module '_SwiftDispatchOverlayShims'
import _SwiftDispatchOverlayShims

like here: Re: [Swift CI] Build Failure: OSS - Swift Package - Ubuntu 16.04 (master) #3537

How i can fix it?

2

I see this occasionally, simply deleting that build directory and starting over fixes it. There's something flaky going on there, but it happens sporadically enough that nobody has probably bothered investigating.

3

yes, just restarting the build solves the problem. but this approach is not applicable for distribution in a package manager.