The language server crashed 5 times in the last 3 minutes.

[remline]

Type: LanguageService
Upon opening any C file, "The language server crashed 5 times in the last 3 minutes. It will not be restarted."

• OS and Version: Windows 7 SP1
• VS Code Version: 1.26.1
• C/C++ Extension Version: 0.18.1
• Other extensions: None

I will attach logs if I figure out how. The instructions in "Enabling logging.md" did not reveal the "C/C++" option in the log filter selector.

[bobbrow]

Unfortunately, when the extension crashes VS Code removes our logging channel. You can try using the old logging method which writes logs to files: https://github.com/Microsoft/vscode-cpptools/blob/master/Documentation/LanguageServer/Archive/Enabling%20logging.md

We also need to write up some instructions for debugging crashes.

[remline]

Thanks, Bob. I gave the logging a try. Five log files were created, but all of them were empty (zero bytes). The empty files were named: vscode.cpp.log.4064.txt; vscode.cpp.log.5428.txt; vscode.cpp.log.8596.txt; vscode.cpp.log.11636.txt; vscode.cpp.log.12256.txt.

I tried log levels 5, 6, and 7.

[bobbrow]

When the extension starts up it should create that log file and immediately write Log initialized. Verbosity level = N (where N is the log level you set). It must be crashing before flushing that message to the log file.

Perhaps you can try installing procdump as the post-mortem debugger? I have been having trouble getting post-mortem debuggers to work on Windows 10, but I used to use them a lot on Windows 7, so this might still work on your version of Windows.

[joelspadin]

I'm running into a problem with the same symptoms.

• OS and Version: Windows 7 SP1
• VS Code Version: 1.27.1
• C/C++ Extension Version: 0.18.1

I have a project with two configurations: a Windows build, and a build that uses a Yocto toolchain to cross compile to ARM Linux. When using the Windows configuration, the C++ language service works fine. As soon as I switch to the Linux configuration and open a C file, the language service crashes five times and stops restarting. I tried the instructions listed above and also got a bunch of empty log files.

I used procdump with the following options and got this dump: Microsoft.VSCode.CPP.IntelliSense.Msvc.exe_180910_123159.dmp.zip

procdump -e -t -w Microsoft.VSCode.CPP.IntelliSense.Msvc.exe

I see stack info in the dump, but I don't have source code so I can't tell if there's any useful info there.

My c_cpp_properties.json looks like this (with some parts redacted because the project is proprietary):

{
    "configurations": [
        {
            "name": "Windows simulator", 
            "intellisenseMode": "msvc-x64", 
            "compilerPath": "C:\\Program Files (x86)\\Microsoft Visual Studio 12.0\\VC\\BIN\\CL.exe", 
            "cStandard": "c99", 
            "cppStandard": "c++11", 
            "compileCommands": "<build directory>\\compile_commands.json", 
            "includePath": [
                <project include paths>,
                "C:\\Program Files (x86)\\Microsoft Visual Studio 12.0\\VC\\ATLMFC\\INCLUDE", 
                "C:\\Program Files (x86)\\Microsoft Visual Studio 12.0\\VC\\INCLUDE", 
                "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\shared", 
                "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\um", 
                "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\winrt"
            ], 
            "defines": [
                <project defines>,
                "_CRT_SECURE_NO_WARNINGS", 
                "WIN32", 
                "WINVER=0x0600", 
                "NOMINMAX", 
                "WIN32_LEAN_AND_MEAN"
            ]
        }, 
        {
            "name": "ARM Linux", 
            "intellisenseMode": "gcc-x64", 
            "compilerPath": "<path to yocto binaries>\\arm-poky-linux-gnueabi-gcc.exe -marm <more arm-specific options> --sysroot=<path to yocto sysroot>", 
            "cStandard": "c99", 
            "cppStandard": "c++11", 
            "compileCommands": "<build directory>\\compile_commands.json", 
            "includePath": [
                <project include paths>,
                "<path to yocto sysroot>\\usr\\include", 
                "<path to yocto sysroot>\\usr\\include\\<some other libraries>",
                "<path to yocto sysroot>\\usr\\include\\<some other libraries>",
                etc...
            ], 
            "defines": [
                <project defines>,
                "__linux__=1"
            ]
        }
    ], 
    "version": 4
}

[milanpiskla]

I got the same error on Win 10, VS Code 1.27.2, C/C++ Extension 0.18.1

[Error  9:20:22 PM] Connection to server got closed. Server will not be restarted.
[Error  9:20:22 PM] Request textDocument/documentSymbol failed.
Error: Connection got disposed.
at Object.dispose (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\main.js:825:25)
at Object.dispose (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-languageclient\lib\client.js:57:35)
at LanguageClient.handleConnectionClosed
(C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-languageclient\lib\client.js:1864:38)
at LanguageClient.handleConnectionClosed
(C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-languageclient\lib\main.js:106:15)
at closeHandler (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-languageclient\lib\client.js:1852:18)
at CallbackList.invoke (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\events.js:71:39)
at Emitter.fire (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\events.js:135:36)
at closeHandler (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\main.js:221:26)
at CallbackList.invoke (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\events.js:71:39)
at Emitter.fire (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\events.js:135:36)
at StreamMessageWriter.AbstractMessageWriter.fireClose
(C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\messageWriter.js:57:27)
at Socket.<anonymous> (C:\Users\Milan\.vscode\extensions\ms-vscode.cpptools-0.18.1\node modules\vscode-jsonrpc\lib\messageWriter.js:79:63)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
at Pipe._handle.close [as _onclose] (net.js:554:12)

Please note that I was not able to copy/paste the stacktrace directly as it disappeared immediately. This one was ocr-ed from the screenshot, thus not 100% accurate.

[sean-mcmanus]

@milanpiskla That log is not helpful -- are you able to attach a debugger to the Microsoft.VSCode.CPP.Extension.exe before the crash occurs and get a call stack? Or do you have any repro details?

[milanpiskla]

@sean-mcmanus Sorry, I have not been able to attach a debugger as the extension crashes quickly after starting VS Code

[sean-mcmanus]

@milanpiskla If you clone our repository at https://github.com/Microsoft/vscode-cpptools/tree/release, do a Launch Extension and put a breakpoint on the line after languageClient.start(); you should be able to attach to the process before it crashes. Let us know if you have a problem doing that.

[milanpiskla]

@sean-mcmanus I launched the extension as you suggested and got this call stack from the debugger:

 	Microsoft.VSCode.CPP.Extension.exe!__invoke_watson�()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!__invalid_parameter�()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!__invalid_parameter_noinfo�()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!memcpy_s()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!microsoft::vc::get_file_path_actual_case(unsigned short *,unsigned int,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!microsoft::vc::canonicalize_file_path(char const *,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!vscode::canonicalize(char const *,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!parse_includes(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > &,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool,enum IntelliSenseMode &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)	Unknown	Non-user code. Symbols loaded.
	Microsoft.VSCode.CPP.Extension.exe!gcc_info::get_system_defaults(class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool,struct compilation_args &)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!gcc_info::gcc_info(class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!std::_Ref_count_obj<class gcc_info>::_Ref_count_obj<class gcc_info><class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool &>(class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool &)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!std::make_shared<class gcc_info,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool &>(class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool &)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!compiler_info::find_or_create(class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!compiler_info::get(class vscode::ext::optional<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,enum IntelliSenseMode,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,bool)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!compile_commands_database::get_compilation_args(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct configuration const &,bool,struct compilation_args &)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!cpp_properties::provide_args(char const *,char const *,char const *)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!create_async_work(char const *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,char const *,int,class std::shared_ptr<class browse_engine>,class std::shared_ptr<class compilation_args_provider>,class std::function<void >,class std::function<void >)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!<lambda>(void)()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!std::_Func_impl_no_alloc<<lambda_cd6ec53400d3f1066a03b3738e08d33d>,void>::_Do_call()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!microsoft::vc::thread_pool::do_work(unsigned int)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!std::_LaunchPad<std::unique_ptr<std::tuple<<lambda_7a5c86eedba4f728bcdfee14fde4807b> >,std::default_delete<std::tuple<<lambda_7a5c86eedba4f728bcdfee14fde4807b> > > > >::_Go()	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!std::_Pad::_Call_func(void *)	Unknown	Non-user code. Symbols loaded.
 	Microsoft.VSCode.CPP.Extension.exe!thread_start<unsigned int (__stdcall*)(void *)>()	Unknown	Non-user code. Symbols loaded.
 	kernel32.dll!74c88484()	Unknown	Non-user code. Cannot find or open the PDB file.
 	[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]		Annotated Frame
 	[External Code]		Annotated Frame

[plaip]

@sean-mcmanus - I have the same issue since the new update.

• Ubuntu 14.04 LTS
• VS Code 1.27.2
• C/C++ Extension: 0.19.0

[sean-mcmanus]

@milanpiskla Ah, I didn't see that call stack -- yeah, that is our top hitter on Windows -- we're still trying to figure out a repro and/or a fix. Do you know what is special about your path that could be causing that, such as certain non-ASCII characters in the path? Are you using WSL with gcc? Is the path Linux or Windows-style? It could be caused by a mismatch between Linux/Windows paths.

@plaip What is the call stack of your crash? You should be able to attach a debugger to Microsoft.VSCode.CPP.Extension.linux before the crash occurs to get the call stack. The issue reported by @milanpiskla started several months ago and is Windows-only. We fixed a regression crash with 0.19.0 that should be released soon in 0.19.1-insiders: #2586 .

[aboulfad]

Identical error as OP. Happening all the time now...

OS and Version: MacOs Mojave
VS Code Version: 1.27.2
C/C++ Extension Version: 0.19.0
Other extensions: None

I believe I am able to reproduce it at will, all it takes is to add a folder to the existing project and soon enough, the error pops up. Unsure the relationship, but i've tried this sequence few times and can confirm that in my case thats how the error triggers. The dir that I add to my project is this open source from Apple: https://opensource.apple.com/source/network_cmds/network_cmds-543/ifconfig.tproj/

[Error - 9:01:40 AM] Connection to server got closed. Server will not be restarted.
[Error - 9:01:40 AM] Request textDocument/hover failed.
Error: Connection got disposed.
	at Object.dispose (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/main.js:825:25)
	at Object.dispose (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-languageclient/lib/client.js:57:35)
	at LanguageClient.handleConnectionClosed (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-languageclient/lib/client.js:1864:38)
	at LanguageClient.handleConnectionClosed (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-languageclient/lib/main.js:106:15)
	at closeHandler (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-languageclient/lib/client.js:1852:18)
	at CallbackList.invoke (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/events.js:71:39)
	at Emitter.fire (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/events.js:135:36)
	at closeHandler (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/main.js:221:26)
	at CallbackList.invoke (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/events.js:71:39)
	at Emitter.fire (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/events.js:135:36)
	at StreamMessageReader.AbstractMessageReader.fireClose (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/messageReader.js:135:27)
	at Socket.<anonymous> (/Users/dev/.vscode/extensions/ms-vscode.cpptools-0.19.0/node_modules/vscode-jsonrpc/lib/messageReader.js:188:62)
	at emitOne (events.js:121:20)
	at Socket.emit (events.js:211:7)
	at Pipe._handle.close [as _onclose] (net.js:554:12)