[swift-lldb-dev] REPL missing required module 'SwiftGlibc'

Kate Stone k8stone at apple.com
Wed Apr 13 18:36:08 CDT 2016

It works as expected in the 3-16 snapshot but exhibits the failure you’ve cited below in the 3-24 and later snapshots.  I see SR-1109 <https://bugs.swift.org/browse/SR-1109> has been filed to track the issue which is definitely not related to the #line directive warning.  We’ll clean up the source of the warning but it should be (a) completely innocuous and (b) hidden from view given that it relates to code you didn’t actually type in the REPL.  We’re already tracking both of these minor issues.
… which just leaves the bigger question about what regressed between 3-16 and 3-24.  I’ll prompt members of my team to give some suggestions about where to start investigating.

Kate Stone k8stone at apple.com <mailto:k8stone at apple.com>
 Xcode Low Level Tools

> On Apr 13, 2016, at 9:18 AM, Ryan Lovelett via swift-lldb-dev <swift-lldb-dev at swift.org> wrote:
> In my latest builds (I just build
> swift-DEVELOPMENT-SNAPSHOT-2016-04-12-a) I've noticed that when I
> attempt to open the REPL and `import Glibc` the REPL reports:
> warning: <REPL>:1:1: warning: #line directive is deprecated, please use
> #sourceLocation instead
> #line 2 "repl.swift"
> ^~~~~
> #sourceLocation
> warning: repl.swift:3:1: warning: #line directive is deprecated, please
> use #sourceLocation instead
> #line
> ^~~~~
> #sourceLocation
> error: repl.swift:2:8: error: missing required module 'SwiftGlibc'
> import Glibc
> Also lldb seems to suffer from this same issue as well. If I compile a
> source and attach to the process and stop at a breakpoint it reports
> similar (e.g., `error: missing required module 'SwiftGlibc'`).
> I'd use `git bisect` to track down when it started doing that.
> Unfortunately this is probably the first time I've ever actually opened
> the REPL. So it might have been broken all along.
> Incidentally it works just find if I compile a source (`swiftc`) that
> imports Glibc.
> Is this a known issue? Any suggestions on where I should begin my
> investigation into resolving this?
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> swift-lldb-dev at swift.org
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