blocks|key|78348|text|从Xcode6.1开始，如果您尝试两次po命令，那么第二次尝试将会起作用。对于每个新的调试会话，第一个po命令总是失败，但随后的调用可以工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|78349|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As of Xcode 6.1 if you attempt the po command twice it will work on the second attempt. The first po command will always fail for each new debugging session but subsequent calls work.

blocks|key|78358|text|在xcode+7.3.1中也有同样的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|78359|error:+Error+in+auto-import:
failed+to+get+module+'Touch'+from+AST+context:
<module-includes>:1:9:+note:+in+file+included+from+<module-includes>:1:
#import+"/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2/libxml/tree.h"
++++++++%5E
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2/libxml/tree.h:17:10:+error:+'libxml/xmlversion.h'+file+not+found
#include+<libxml/xmlversion.h>
+++++++++%5E
could+not+build+Objective-C+module+'LibXML2'|code-block|syntax|javascript|78360|但是您可以使用fr+v+managedObject而不是po+managedObject。|offset|length|style|CODE|78361|entityMap^0|0|0|7|I|S|G|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

Have same issue in xcode 7.3.1:

<pre><code>error: Error in auto-import:
failed to get module 'Touch' from AST context:
&lt;module-includes&gt;:1:9: note: in file included from &lt;module-includes&gt;:1:
#import "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2/libxml/tree.h"
 ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2/libxml/tree.h:17:10: error: 'libxml/xmlversion.h' file not found
#include &lt;libxml/xmlversion.h&gt;
 ^
could not build Objective-C module 'LibXML2'
</code></pre>

But you can use <code>fr v managedObject</code> instead of <code>po managedObject</code>.

blocks|key|78389|text|清理我的项目和删除DerivedData对我很有效。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|78390|entityMap^0|9|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

A clean of my project and deleting <code>DerivedData</code> worked for me.

blocks|key|4585171|text|我在WWDC2017与一位苹果工程师讨论过类似的错误信息。这个问题似乎有很多原因，我意识到我的问题与上面描述的略有不同。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4585172|我的团队花了几个星期的时间试图解决这个问题，结果它成了苹果编译器上的一个bug，我们自己永远也找不到。而且，它有一个非常简单的变通方法。|4585173|所以，这只是我在这里发布修复，是为了最大化其他人搜索这个令人困惑的错误消息并找到这个答案的可能性。|4585174|所以，这就是它。在我们的例子中，我们有一个混合使用Swift和Objective-C框架的Objective-C项目。此修复可能适用于略有不同的上下文，只需尝试一下。|4585175|从框架和项目中聚合编译标志的方式碰巧有一个bug，“纯Objective-C”项目“激活”了它。|4585176|解决方案:在你的Objective-C项目中添加一个单独的，空的Swift文件("Whatever.swift"，或者别的什么)，使它不再是纯objective-C(新建->文件->Swift文件，不要创建桥接头。该文件将只包含Foundation的导入)。|4585177|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

I discussed a similar error message with an Apple engineer at WWDC2017. It seems like this issue can have many causes, and I am aware that mine is slightly different than the one described above. 

My team spent weeks trying to figure this out, and it ended up being a bug on Apple's compiler, which we could never have figured out by ourselves. Also, it has a VERY easy workaround. 

So, this is just me posting the fix here, in order to maximize the probability that someone else does a search for this confusing error message, and finds this answer.

So, here it is. In our case, we had an Objective-C project using a mix of Swift and Objective-C frameworks. This fix might apply in slightly different contexts, just try it.

There happens to be a bug with the way the compiling flags get aggregated from the frameworks and the project, and the "pure Objective-C" project "activates" it. 

Solution: add one single, empty Swift file ("Whatever.swift", or whatever) in your Objective-C project, making it not-pure-objective-c any more (new->file->Swift file, don't create the bridging header. The file will only contain the import of Foundation).

An attempt to print object (<code>po</code> command) in xcode 6 beta 6 OSX Swift project results in this error message:

<pre><code>(lldb) po managedObject
error: Error in auto-import:
failed to get module '__ObjC' from AST context
</code></pre>

In this case the object in question is an instance of <code>NSManagedObject</code>.

Any advice on how to help auto-import in getting <code>__ObjC module</code> into LLVM Abstract Syntax Tree context?

unable to print object ('po') in xcode6 beta 6 osx swift project: (Error in auto-import: failed to get module '__ObjC' from AST context)

Objective-C

编译器

Swift

Xcode

在xcode 6 beta 6 OSX Swift项目中尝试打印对象(po命令)会导致以下错误消息：(lldb) po managedObjecterror: Error in auto-import:failed to get module '__ObjC' from AST context在本例中，有问题的对象是N...

问无法打印xcode6 beta 6 osx swift项目中的对象('po')：(自动导入错误:无法从xcode6上下文中获取模块'__ObjC‘)
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