问题
I am getting a message in my debugger:
The LLDB RPC server has crashed. The crash log is located in ~/Library/Logs/DiagnosticReports and has a prefix 'lldb-rpc-server'. Please file a bug and attach the most recent crash log.
回答1:
In my case the LLDB RPC server consistently crashed every time I ran my app, even after cleaning the build folder and removing and reinstalling Xcode (Version 8.3.3 (8E3004b)) completely.
It turned out that apparently LLDB took objection to a breakpoint I had set, just moving this breakpoint by a line resolved the issue.
回答2:
Make sure you are not running the app in release mode, if it is in release mode then change it to debug.
回答3:
I had the same problem and fixed it after I deleted some of the breakpoints. Not sure why this happen at all, but at least you can remove breakpoints and use some NSLog() or print() if you are in Swift and debug with the help of those. Good luck!
回答4:
In my case: I update to Xcode Version 9.3 (9E145) recently and Xcode execute to the line with breakpoint then I type "po XXX" commend it will show the same message. I try to delete following files
~/Library/Preferences/com.apple.dt.Xcode.plist
~/Library/Caches/com.apple.dt.Xcode
and it solved. not knowing exactly why but worth to try.
remember to backup those files in order to recovered in case any unexpected situation occur.
回答5:
Clearly a lot of different causes for this, but for me I was using a DispatchGroup to keep track of multiple async tasks.
I had forgotten to call dispatchGroup.enter() before one of the async tasks (but still calling dispatchGroup.leave() when it finished).
Adding this in fixed the crash for me.
回答6:
In my case. I'm also using SQLite.swift to create database. The crashing happened when I tried to change a column data type of an existing table in code(which was not in the right way to do it), then inserted a tuple with new data type, then tried to print all the tuple out.
Solution: Delete the .sqlite3 database file you have or delete the table with conflict data type and recreate them all.
来源：https://stackoverflow.com/questions/43635522/what-is-lldb-rpc-server-when-does-it-crash-in-xcode-why-it-crashes