[swift-build-dev] Cannot debug SwiftPM package in Xcode

[Jim Ingham]

There's a bug in the code that's supposed to dump the error message when we can't reconstitute a module which cause the error not to get printed.  You can work around that to get lldb to show you the error by setting the environment variable LLDB_SWIFT_DUMP_DIAGS, and then running lldb with that set.  Then you should get you whatever error was causing the clang importer used by lldb to fall over.

Jim

> On Nov 11, 2016, at 5:14 PM, Daniel Dunbar <daniel_dunbar at apple.com> wrote:
> 
> Can you file a JIRA for this?
> 
> - Daniel
> 
>> On Nov 11, 2016, at 11:08 AM, Ryan Lovelett via swift-build-dev <swift-build-dev at swift.org> wrote:
>> 
>> I've been trying to debug a program that is packaged/built with SwiftPM.
>> Unfortunately, the Xcode project generated via `swift package
>> generate-xcodeproj` cannot inspect the variables. Whenever I try to
>> print an object from the lldb command-line in Xcode I get this error:
>> 
>> ```
>> po r
>> warning: Swift error in module example.
>> Debug info from this module will be unavailable in the debugger.
>> 
>> warning: Swift error in module SourceKittenFramework.
>> Debug info from this module will be unavailable in the debugger.
>> 
>> error: in auto-import:
>> failed to get module 'example' from AST context:
>> ```
>> 
>> I've narrowed it down to a specific dependency, SourceKittenFramework,
>> but I'm not sure if it is a bug in SwiftPM or in the package
>> configuration or something else completely.
>> 
>> I've attached a minimal SwiftPM package (`$ tar xvf
>> cannot-debug.tar.xz`) that should generate an Xcode project that
>> exemplifies the issue.
>> 
>> Can someone please help me understand why this is not debuggable?
>> 
>> Thank you,
>> 
>> Ryan Lovelett
>> <cannot-debug.tar.xz>_______________________________________________
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>