clang-tidy and `"editor.formatOnSave": true,` not updating properly on save

[thernstig]

Environment

OS and Version: Windows 11 23H2
VS Code Version: 1.92.2
C/C++ Extension Version: v1.21.6
If using SSH remote, specify OS of remote machine: wsl (Ubuntu 20.04)

Bug Summary and Steps to Reproduce

Bug Summary:

clang-tidy and "editor.formatOnSave": true, not updating properly on save. The integration works when opening a file or reloading VS Code. But often when working and save all the time, the clang-tidy output does not get updated. It works fine via the CLI clang-tidy so this is a VS Code extension/integration fault towards clang-tidy.

Another example without the ErrorLens extension enabled:

Running it in the shell shows:

> clang-tidy -quiet -p build/Debug/ src/helloworld.c 
1387 warnings generated.

Steps to reproduce:

1. Enable this in config:

{
    "editor.formatOnPaste": true,
    "editor.formatOnSave": true,
    "C_Cpp.codeAnalysis.clangTidy.enabled": true
}

3. Enable this in .clang-tidy and .clang-format:

# yaml-language-server: $schema=https://json.schemastore.org/clang-tidy.json

Checks:
  - "*"
  - "-llvmlibc-restrict-system-libc-headers"
  - "-llvm-include-order"

# yaml-language-server: $schema=https://json.schemastore.org/clang-format.json

BasedOnStyle: Chromium

InsertNewlineAtEOF: true
IncludeBlocks: "Regroup"

4. Try to edit the file and save every now and then and invoke various linting errors.

Expected behavior:
For it to work. This is a rather crucial bug I would say, as this not working will be a large time sink for teams as we cannot see faults properly directly when we code, but have to run the linting separately in one way or another.

Configuration and Logs

`c_cpp_properties.json`


{
    "configurations": [
        {
            "name": "CMake as IntelliSense provider",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [],
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "c99",
            "intelliSenseMode": "linux-gcc-x64",
            "compileCommands": "${config:cmake.buildDirectory}/compile_commands.json",
            "configurationProvider": "ms-vscode.cmake-tools"
        }
    ],
    "version": 4
}


`C/C++: Log Diagnostics`

-------- Diagnostics - 9/14/2024, 3:21:07 PM
Version: 1.21.6
Current Configuration:
{
"name": "CMake as IntelliSense provider",
"includePath": [
"/home/tobias/code/c-test/"
],
"defines": [],
"compilerPath": "/usr/bin/gcc",
"cStandard": "c99",
"intelliSenseMode": "linux-gcc-x64",
"compileCommands": "/home/tobias/code/c-test/build/compile_commands.json",
"configurationProvider": "ms-vscode.cmake-tools",
"compilerPathIsExplicit": true,
"cStandardIsExplicit": true,
"cppStandardIsExplicit": false,
"intelliSenseModeIsExplicit": true,
"compilerPathInCppPropertiesJson": "/usr/bin/gcc",
"compileCommandsInCppPropertiesJson": "${config:cmake.buildDirectory}/compile_commands.json",
"configurationProviderInCppPropertiesJson": "ms-vscode.cmake-tools",
"mergeConfigurations": false,
"browse": {
"path": [
"/home/tobias/code/c-test/",
"${workspaceFolder}"
],
"limitSymbolsToIncludedHeaders": true
}
}
Custom browse configuration:
{
"browsePath": [
"/home/tobias/code/c-test/src"
],
"compilerPath": "/usr/bin/gcc",
"compilerArgs": [],
"compilerFragments": [
"-g -std=gnu90"
]
}
cpptools version (native): 1.21.6.0
Translation Unit Mappings:
[ /home/tobias/code/c-test/src/helloworld.c - source TU]:
/usr/include/stdio.h
[ /home/tobias/code/c-test/src/main.c - source TU]:
Translation Unit Configurations:
[ /home/tobias/code/c-test/src/helloworld.c ]:
Process ID: 23834
Memory Usage: 20 MB
Compiler Path: /usr/bin/gcc
Includes:
System Includes:
/usr/lib/gcc/x86_64-linux-gnu/9/include
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
Standard Version: c23
IntelliSense Mode: linux-gcc-x64
Other Flags:
--gcc
--gnu_version=90400
[ /home/tobias/code/c-test/src/main.c ]:
Process ID: 23756
Memory Usage: 15 MB
Compiler Path: /usr/bin/gcc
Includes:
System Includes:
/usr/lib/gcc/x86_64-linux-gnu/9/include
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
Standard Version: c23
IntelliSense Mode: linux-gcc-x64
Other Flags:
--gcc
--gnu_version=90400
Total Memory Usage: 35 MB
Browse Paths from compile_commands.json, from workspace folder: /home/tobias/code/c-test
/home/tobias/code/c-test/src

------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 4909

`LSP logging`

```sh
LSP: (received) cpptools/formatDocument: file: ///home/tobias/code/c-test/src/helloworld.c (id: 598)
LSP: (invoked) cpptools/formatDocument: file: ///home/tobias/code/c-test/src/helloworld.c (id: 598)
Formatting document: file: ///home/tobias/code/c-test/src/helloworld.c
Formatting Engine: clangFormat
/home/tobias/.vscode-server/extensions/ms-vscode.cpptools-1.21.6-linux-x64/bin/../LLVM/bin/clang-format -style=file -fallback-style=LLVM --Wno-error=unknown -assume-filename=/home/tobias/code/c-test/src/helloworld.c
LSP: Sending response (id: 598)
LSP: (received) textDocument/willSaveWaitUntil: file: ///home/tobias/code/c-test/src/helloworld.c (id: 599)
LSP: (invoked) textDocument/willSaveWaitUntil: file: ///home/tobias/code/c-test/src/helloworld.c (id: 599)
LSP: Sending response (id: 599)
willSaveWaitUntil: 0ms
LSP: (received) textDocument/didSave: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) textDocument/didSave: file: ///home/tobias/code/c-test/src/helloworld.c
Intellisense update pending for: file: ///home/tobias/code/c-test/src/helloworld.c
tag parsing file: /home/tobias/code/c-test/src/helloworld.c
/home/tobias/.vscode-server/extensions/ms-vscode.cpptools-1.21.6-linux-x64/bin/../LLVM/bin/clang-tidy
--export-fixes=/tmp/{
    12457784936315504446
}/fixes140425389894448.yaml
--quiet
--use-color=false
/home/tobias/code/c-test/src/helloworld.c
--
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-isystem/usr/include/x86_64-linux-gnu
-isystem/usr/include
LSP: (received) cpptools/fileChanged: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) cpptools/fileChanged: file: ///home/tobias/code/c-test/src/helloworld.c
warning: redefining builtin macro [clang-diagnostic-builtin-macro-redefined
]
IntelliSense update scheduled and TU acquisition started for: file: ///home/tobias/code/c-test/src/helloworld.c
Update IntelliSense time (sec): 0.002
LSP: (received) cpptools/getFoldingRanges: file: ///home/tobias/code/c-test/src/helloworld.c (id: 600)
LSP: (invoked) cpptools/getFoldingRanges: file: ///home/tobias/code/c-test/src/helloworld.c (id: 600)
LSP: Sending response (id: 600)
LSP: (received) cpptools/getDocumentSymbols: file: ///home/tobias/code/c-test/src/helloworld.c (id: 601)
LSP: (invoked) cpptools/getDocumentSymbols: file: ///home/tobias/code/c-test/src/helloworld.c (id: 601)
LSP: Sending response (id: 601)
LSP: (received) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (received) cpptools/didChangeTextEditorSelection
LSP: (invoked) cpptools/didChangeTextEditorSelection
LSP: (received) cpptools/getCodeActions: file: ///home/tobias/code/c-test/src/helloworld.c (id: 602)
LSP: (invoked) cpptools/getCodeActions: file: ///home/tobias/code/c-test/src/helloworld.c (id: 602)
LSP: Sending response (id: 602)
Database safe to open.
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (received) cpptools/didChangeTextEditorSelection
LSP: (invoked) cpptools/didChangeTextEditorSelection
LSP: (received) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (invoked) cpptools/didChangeActiveEditor: file: ///home/tobias/code/c-test/src/helloworld.c
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors

### Other Extensions

_No response_

### Additional context

_No response_

[sean-mcmanus]

Your screenshot says the clang-tidy warning is from a "GCC" source, which is not our extension. Are you able to repro the bug using the clang-tidy integration from our extension?

[thernstig]

@sean-mcmanus I do not have any other C/C++ extensions in my repo. The problems look like this in the problems pane:

These are the enabled extensions:

It is from your extensions. See here:

[thernstig]

@sean-mcmanus I accidantelly closed this, can you please re-open?

I did some more extensive testing. You can see in this image that the only extensions enabled are the Remote Development (locally) and the 4 extensions you see in the remote in the picture below.

For reference, It seems it is your sister extension CMake Tools that does add the extra warnings seen.

But neither your, nor the CMake Tools extension is clearing the issues properly on save. It is very easy to reproduce. Just introduce a variable with a short name of one character, save, change it to a longer one, save again etc.