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cpptools_srv crashes in cpptools_srv!form_type_specifier() #13925
Description
Environment
- OS and Version: Windows 11 Home (23H2, build 22631.5472)
- VS Code Version: 1.104.0 (commit
f220831ea) - C/C++ Extension Version: both 1.26.4 and 1.26.5
Bug Summary and Steps to Reproduce
Bug Summary:
After 1.26.4, cpptools-srv constantly crashes with this window whenever I edit the C++ source with compilerPath set to arm-none-eabi-gcc.exe for devkitARM toolchain.
It previously worked without issues in 1.26.3.
Steps to reproduce:
- Install devkitARM toolchain
- I use
GBA Developmentoption on the graphical installer
- I use
- Set the
compilerPathto point itsarm-non-eabi-gcc.exe- On Windows, the default path is
C:/devkitPro/devkitARM/bin/arm-none-eabi-gcc.exe
- On Windows, the default path is
- Start editing the code.
- You'll see the crash in a few seconds.
Configuration and Logs
`c_cpp_properties.json`
{
"configurations": [
{
"name": "devkitARM",
"includePath": [
"${workspaceFolder}/**"
],
"compilerPath": "C:/devkitPro/devkitARM/bin/arm-none-eabi-gcc.exe",
"cppStandard": "c++23",
"cStandard": "c17"
}
],
"version": 4
}
Language server logging
...
LSP: Sending response (id: 40)
LSP: (received) cpptools/getFoldingRanges: file:///c%3A/Users/Home/test4/main.cpp (id: 41)
LSP: (invoked) cpptools/getFoldingRanges: file:///c%3A/Users/Home/test4/main.cpp (id: 41)
LSP: Sending response (id: 41)
LSP: (received) textDocument/willSaveWaitUntil: file:///c%3A/Users/Home/test4/main.cpp (id: 42)
Intellisense update pending for: file:///c%3A/Users/Home/test4/main.cpp
LSP: (invoked) textDocument/willSaveWaitUntil: file:///c%3A/Users/Home/test4/main.cpp (id: 42)
LSP: Sending response (id: 42)
willSaveWaitUntil: 0ms
LSP: (received) textDocument/didSave: file:///c%3A/Users/Home/test4/main.cpp
LSP: (invoked) textDocument/didSave: file:///c%3A/Users/Home/test4/main.cpp
LSP: $/cancelRequest (textDocument/completion, id: 31)
LSP: (received) cpptools/fileChanged: file:///c%3A/Users/Home/test4/main.cpp
LSP: (invoked) cpptools/fileChanged: file:///c%3A/Users/Home/test4/main.cpp
tag parsing file: C:\Users\Home\test4\main.cpp
IntelliSense update scheduled and TU acquisition started for: file:///c%3A/Users/Home/test4/main.cpp
IntelliSense process crash detected: handle_completion
Update IntelliSense time (sec): 0.017
Shutting down IntelliSense server: C:\Users\Home\test4\main.cpp
C/C++: Log Diagnostics
-------- Diagnostics - 9/12/2025, 9:45:29 AM
Version: 1.26.5
Current Configuration:
{
"name": "devkitARM",
"includePath": [
"c:/Users/Home/test4/**"
],
"compilerPath": "C:/devkitPro/devkitARM/bin/arm-none-eabi-gcc.exe",
"cppStandard": "c++23",
"cStandard": "c17",
"compilerPathIsExplicit": true,
"cStandardIsExplicit": true,
"cppStandardIsExplicit": true,
"intelliSenseModeIsExplicit": true,
"recursiveIncludesReduceIsExplicit": false,
"recursiveIncludesPriorityIsExplicit": false,
"recursiveIncludesOrderIsExplicit": false,
"compilerPathInCppPropertiesJson": "C:/devkitPro/devkitARM/bin/arm-none-eabi-gcc.exe",
"defines": [
"LOCAL"
],
"intelliSenseMode": "windows-gcc-x64",
"mergeConfigurations": false,
"recursiveIncludes": {},
"browse": {
"limitSymbolsToIncludedHeaders": true
}
}
Modified Settings:
{
"C_Cpp.default.defines": [
"LOCAL"
],
"C_Cpp.default.intelliSenseMode": "windows-gcc-x64",
"C_Cpp.default.compilerPath": "C:/Library/mingw64/bin/g++.exe",
"C_Cpp.default.cppStandard": "c++20",
"C_Cpp.loggingLevel": "Debug",
"C_Cpp.copilotHover": "disabled"
}
Additional Tracked Settings:
{
"editorTabSize": 4,
"editorInsertSpaces": true,
"editorAutoClosingBrackets": "languageDefined",
"filesEncoding": "utf8",
"filesAssociations": {},
"filesExclude": {
"**/.git": true,
"**/.svn": true,
"**/.hg": true,
"**/.DS_Store": true,
"**/Thumbs.db": true
},
"filesAutoSaveAfterDelay": true,
"editorInlayHintsEnabled": true,
"editorParameterHintsEnabled": true,
"searchExclude": {
"**/node_modules": true,
"**/bower_components": true,
"**/*.code-search": true
},
"workbenchSettingsEditor": "ui"
}
cpptools version (native): 1.26.4.0
Current database path: C:\USERS\HOME\APPDATA\LOCAL\MICROSOFT\VSCODE-CPPTOOLS\429A146AB812450C7DEF67187448064E\.BROWSE.VC.DB
Translation Unit Mappings:
[ C:\Users\Home\test4\main.cpp - source TU]:
Translation Unit Configurations:
[ C:\Users\Home\test4\main.cpp ]
Process ID: 9528
Memory Usage: 172 MB
Compiler Path: C:\devkitPro\devkitARM\bin\arm-none-eabi-gcc.exe
Include paths:
system include: C:\devkitPro\devkitARM\arm-none-eabi\include\c++\15.1.0
system include: C:\devkitPro\devkitARM\arm-none-eabi\include\c++\15.1.0\arm-none-eabi
system include: C:\devkitPro\devkitARM\arm-none-eabi\include\c++\15.1.0\backward
system include: C:\devkitPro\devkitARM\lib\gcc\arm-none-eabi\15.1.0\include
system include: C:\devkitPro\devkitARM\lib\gcc\arm-none-eabi\15.1.0\include-fixed
system include: C:\devkitPro\devkitARM\arm-none-eabi\include
Defines:
LOCAL
Standard Version: c++23
IntelliSense Mode: windows-gcc-arm
Other Flags:
--g++
--gnu_version=150100
Total Memory Usage: 172 MB
------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 1129
Other Extensions
I've disabled all the other extensions, but the issue persists.
Additional context
Call stack of the cpptools-srv when crash happens:
ucrtbase.dll!abort() (Unknown Source:0)
ucrtbase.dll!terminate() (Unknown Source:0)
ucrtbase.dll!__C_specific_handler_noexcept() (Unknown Source:0)
ntdll.dll!RtlpExecuteHandlerForException() (Unknown Source:0)
ntdll.dll!RtlDispatchException() (Unknown Source:0)
ntdll.dll!KiUserExceptionDispatch() (Unknown Source:0)
KernelBase.dll!RaiseException() (Unknown Source:0)
vcruntime140.dll!_CxxThrowException(void * pExceptionObject, const _s__ThrowInfo * pThrowInfo) Line 80 (d:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\throw.cpp:80)
cpptools-srv.exe!cfe_throw(void) (Unknown Source:0)
cpptools-srv.exe!cfe_exit() (Unknown Source:0)
cpptools-srv.exe!exit_compilation(enum an_error_severity) (Unknown Source:0)
cpptools-srv.exe!term_compilation(enum an_error_severity) (Unknown Source:0)
cpptools-srv.exe!wrap_up_diagnostic() (Unknown Source:0)
cpptools-srv.exe!exit_unrecoverable_compilation(void) (Unknown Source:0)
cpptools-srv.exe!form_type_specifier() (Unknown Source:0)
cpptools-srv.exe!form_type_first_part(struct a_type *,int,int,unsigned int,int,struct an_il_to_str_output_control_block *) (Unknown Source:0)
cpptools-srv.exe!an_edge_typed_symbol_impl_t<struct edge::typedef_symbol>::form_declaration(struct msvc::buffer<char> *,unsigned int) (Unknown Source:0)
cpptools-srv.exe!``edge_intellisense_server_impl::handle_completion(struct cpp_intellisense::DocumentPosition const &,bool,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct cpp_intellisense::CompletionResponse &,struct snapshot::snapshot_session_t const &)'::`2'::<lambda_4>::operator()(class edge::intellisense_operation &,struct cpp_intellisense::CompletionResponse &)'::`2'::<lambda_3>::operator()(class std::unordered_map<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct completion_item *,struct std::hash<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >,struct std::equal_to<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >,class std::allocator<struct std::pair<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const ,struct completion_item *> > > &,int) (Unknown Source:0)
cpptools-srv.exe!`edge_intellisense_server_impl::handle_completion(struct cpp_intellisense::DocumentPosition const &,bool,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct cpp_intellisense::CompletionResponse &,struct snapshot::snapshot_session_t const &)'::`2'::<lambda_4>::operator()(class edge::intellisense_operation &,struct cpp_intellisense::CompletionResponse &) (Unknown Source:0)
cpptools-srv.exe!edge_intellisense_operation::perform_isense_operation_helper<struct cpp_intellisense::CompletionResponse>(char const *,class edge::intellisense_operation &,struct a_canonicalized_file_name,class std::function<void (class edge::intellisense_operation &,struct cpp_intellisense::CompletionResponse &)> &&,struct cpp_intellisense::CompletionResponse &,struct snapshot::snapshot_session_t const &) (Unknown Source:0)
cpptools-srv.exe!edge_intellisense_operation::perform_isense_operation<struct cpp_intellisense::CompletionResponse>(char const *,struct edge::file_position const &,class std::function<void (class edge::intellisense_operation &,struct cpp_intellisense::CompletionResponse &)> &&,struct cpp_intellisense::CompletionResponse &,struct snapshot::snapshot_session_t const &,bool) (Unknown Source:0)
cpptools-srv.exe!edge_intellisense_server_impl::handle_completion(struct cpp_intellisense::DocumentPosition const &,bool,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct cpp_intellisense::CompletionResponse &,struct snapshot::snapshot_session_t const &) (Unknown Source:0)
cpptools-srv.exe!cpp_intellisense::server_stub::handle_completion(class msvc::deserializer_t &,class msvc::serializer_t &) (Unknown Source:0)
cpptools-srv.exe!msvc::base_channel_t::dispatch_message(class std::vector<unsigned char,class std::allocator<unsigned char> > const &,class std::vector<unsigned char,class std::allocator<unsigned char> > &) (Unknown Source:0)
cpptools-srv.exe!msvc::common_channel_t::perform_call(unsigned int,class std::vector<unsigned char,class std::allocator<unsigned char> > const &) (Unknown Source:0)
cpptools-srv.exe!worker() (Unknown Source:0)
cpptools-srv.exe!uv__thread_start() (Unknown Source:0)
ucrtbase.dll!thread_start<unsigned int (__cdecl*)(void *),1>() (Unknown Source:0)
kernel32.dll!BaseThreadInitThunk() (Unknown Source:0)
ntdll.dll!RtlUserThreadStart() (Unknown Source:0)
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sean-mcmanus commentedon Sep 12, 2025
copyrat90 That crash should happen with 1.26.3 too if you look at the C/C++ logging -- 1.26.4 just causes the UI to appear -- the crash UI should be configurable on the Windows OS so that it doesn't appear. Do you think we should attempt to override the Windows default crash UI behavior so that the crash is more hidden like with 1.26.3? Have you changed the default Windows settings to enable the crash UI to appear? For some reason, I don't get a crash UI on Windows (maybe due to internal Microsoft configuration?).
copyrat90 commentedon Sep 12, 2025
Yes, it seems that the same crash happens on 1.26.3 too with the same call stack. I missed that.
I think if you can't fix this, you should at least provide the option to hide the crash UI.
It appears every 5 seconds, making the linter basically unusable.
I don't think I changed anything related to crash UI handling.
(Edit: I tried enabling the
Prevent display of the user interface for critical errorin the local group policy settings and restarted my computer, but it still shows the crash UI.)sean-mcmanus commentedon Sep 12, 2025
We have a fix for the crash.
We're still looking into the WER UI issue (I don't know what is disabling the UI on my machine).
Have you checked your reg key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Windows Error Reporting . There's a
from https://learn.microsoft.com/en-us/windows/win32/wer/wer-settings
That you could potentially set to disable the UI.
sean-mcmanus commentedon Sep 13, 2025
We'll add a setting to disable that in our next 1.27.6 pre-release (and default to only having it enabled for the first crash in a session): #13929 . That version is our release candidate so we plan to ship it to release soon after.
copyrat90 commentedon Sep 13, 2025
DontShowUIentry did not exist for me, and manually adding it disabled the crash UI. Thanks!sean-mcmanus commentedon Sep 16, 2025
copyrat90 The crash should be fixed with https://github.com/microsoft/vscode-cpptools/releases/tag/v1.27.6 ...we plan to ship that for non-pre-release on Thursday.
copyrat90 commentedon Sep 16, 2025
I just tested it with the crash UI re-enabled, and it is indeed fixed. Thanks!
The intellisense reacts much faster compared to before - I guess the crash and reload was making it slower.