C# formatter failed - Changes must not overlap

[thomas6441code]

Type: Bug

Issue Description

Steps to Reproduce

Expected Behavior

Actual Behavior

Extension version: 2.130.5
VS Code version: Code - Insiders 1.116.0-insider (1dfb3b9dd41665724360e94791708dfcab81b681, 2026-04-12T20:08:08-07:00)
OS version: Windows_NT x64 10.0.26200
Modes:

Logs

C# log

Details

2026-04-13 20:44:00.835 [info] Locating .NET runtime version 10.0.5
2026-04-13 20:44:01.563 [info] Dotnet path: C:\Program Files\dotnet\dotnet.exe
2026-04-13 20:44:01.563 [info] Activating C# + C# Dev Kit...
2026-04-13 20:44:04.460 [info] info: Program[0]
2026-04-13 20:44:04.461 [info]       Server started with process ID 5932
2026-04-13 20:44:09.263 [info] [Program] Language server initialized
2026-04-13 20:44:09.461 [info] [Program] Monitoring client process 7472 for exit
2026-04-13 20:44:23.147 [info] [textDocument/_vs_getProjectContexts] [Microsoft.CodeAnalysis.MSBuild.BuildHostProcessManager] .NET BuildHost started from c:\Users\Thomas-6441\.vscode-insiders\extensions\ms-dotnettools.csharp-2.130.5-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.exe reloading to start from C:\Program Files\dotnet\dotnet.exe to match necessary SDK location.
2026-04-13 20:44:41.260 [warning] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Project C:\Users\Thomas-6441\AppData\Local\Temp\roslyn-canonical-misc\eeb813c4-f918-4e2f-ba90-9dba97d060fc\Canonical.csproj has unresolved dependencies
2026-04-13 20:44:43.725 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Successfully completed load of C:\Users\Thomas-6441\AppData\Local\Temp\roslyn-canonical-misc\eeb813c4-f918-4e2f-ba90-9dba97d060fc\Canonical.cs
2026-04-13 20:44:43.853 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Restoring Canonical.cs: Running dotnet restore on C:\Users\Thomas-6441\AppData\Local\Temp\roslyn-canonical-misc\eeb813c4-f918-4e2f-ba90-9dba97d060fc\Canonical.cs
2026-04-13 20:44:43.856 [info] [textDocument/_vs_getProjectContexts] [Microsoft.CodeAnalysis.LanguageServer.DotnetCliHelper] Using dotnet executable configured on the PATH
2026-04-13 20:44:58.109 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Restoring Canonical.cs:   Determining projects to restore...
2026-04-13 20:45:02.244 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Restoring Canonical.cs:   Restored C:\Users\Thomas-6441\AppData\Local\Temp\roslyn-canonical-misc\eeb813c4-f918-4e2f-ba90-9dba97d060fc\Canonical.csproj (in 4.65 sec).
2026-04-13 20:45:02.398 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Restore complete
2026-04-13 20:45:02.398 [info] [textDocument/_vs_getProjectContexts] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:42.1889049
2026-04-13 20:45:03.362 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Thomas-6441\Desktop\AuroraEnemy\Enemora_App\tests\Enemora.Logistics.Persistence.Tests\Enemora.Logistics.Persistence.Tests.csproj loaded by C# Dev Kit
2026-04-13 20:45:03.434 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Thomas-6441\Desktop\AuroraEnemy\Enemora_App\tests\Enemora.Logistics.Application.Tests\Enemora.Logistics.Application.Tests.csproj loaded by C# Dev Kit
2026-04-13 20:45:03.435 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\Thomas-6441\Desktop\AuroraEnemy\Enemora_App\src\Logistics.UI\Enemora.Logistics.UI.csproj loaded by C# Dev Kit
2026-04-13 21:32:26.101 [error] Request textDocument/rangeFormatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:32:57.559 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:34:56.704 [error] Request textDocument/rangeFormatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:34:58.237 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:38:32.729 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:42:00.350 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:42:26.145 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]
2026-04-13 21:45:37.012 [error] Request textDocument/formatting failed.
  Message: The changes must not overlap. (Parameter 'changes')
  Code: -32000 
[object Object]

C# LSP Trace Logs log

Details

Environment Information

VSCode version: 1.116.0-insider
C# Extension: 2.130.5
Using OmniSharp: false

Dotnet Information

.NET SDK: Version: 10.0.201 Commit: 4d3023de60 Workload version: 10.0.200-manifests.34a88a22 MSBuild version: 18.3.0-release-26153-122+4d3023de6

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26200
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.201\

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.5
Architecture: x64
Commit: a612c2a105

.NET SDKs installed:
10.0.201 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
DOTNET_CLI_UI_LANGUAGE [en-US]

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

Extension	Author	Version	Folder Name
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bootstrap5-vscode	AnbuselvanRocky	0.5.0	anbuselvanrocky.bootstrap5-vscode-0.5.0
bracket-pair-color-dlw	BracketPairColorDLW	0.0.6	bracketpaircolordlw.bracket-pair-color-dlw-0.0.6
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cmake-tools	ms-vscode	1.22.28	ms-vscode.cmake-tools-1.22.28
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cpptools-extension-pack	ms-vscode	1.5.1	ms-vscode.cpptools-extension-pack-1.5.1
cpptools-themes	ms-vscode	2.0.0	ms-vscode.cpptools-themes-2.0.0
csdevkit	ms-dotnettools	3.11.200	ms-dotnettools.csdevkit-3.11.200-win32-x64
csharp	ms-dotnettools	2.130.5	ms-dotnettools.csharp-2.130.5-win32-x64
csharpextensions	kreativ-software	1.7.3	kreativ-software.csharpextensions-1.7.3
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jupyter	ms-toolsai	2025.10.2026040301	ms-toolsai.jupyter-2025.10.2026040301-win32-x64
jupyter-keymap	ms-toolsai	1.1.2	ms-toolsai.jupyter-keymap-1.1.2
jupyter-renderers	ms-toolsai	1.3.2025062701	ms-toolsai.jupyter-renderers-1.3.2025062701
laravel-artisan	ryannaddy	0.0.31	ryannaddy.laravel-artisan-0.0.31
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laravel-blade-wrapper	IHunte	1.0.2	ihunte.laravel-blade-wrapper-1.0.2
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laravel-extension-pack	onecentlin	1.3.0	onecentlin.laravel-extension-pack-1.3.0
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laravel-goto-view	codingyu	1.3.11	codingyu.laravel-goto-view-1.3.11
laravel-jump-controller	pgl	0.0.34	pgl.laravel-jump-controller-0.0.34
laravel5-snippets	onecentlin	1.19.1	onecentlin.laravel5-snippets-1.19.1
LiveServer	ritwickdey	5.7.10	ritwickdey.liveserver-5.7.10
lldb-dap	llvm-vs-code-extensions	0.5.20260412	llvm-vs-code-extensions.lldb-dap-0.5.20260412
material-icon-theme	PKief	5.33.1	pkief.material-icon-theme-5.33.1
material-palenight-theme	whizkydee	2.0.4	whizkydee.material-palenight-theme-2.0.4
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php-debug	xdebug	1.40.1	xdebug.php-debug-1.40.1
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vscode-kubernetes-tools	ms-kubernetes-tools	1.3.29	ms-kubernetes-tools.vscode-kubernetes-tools-1.3.29
vscode-maven	vscjava	0.45.2025120808	vscjava.vscode-maven-0.45.2025120808
vscode-office	cweijan	3.5.4	cweijan.vscode-office-3.5.4
vscode-postgres	ckolkman	1.4.3	ckolkman.vscode-postgres-1.4.3
vscode-pull-request-github	GitHub	0.135.2026041304	github.vscode-pull-request-github-0.135.2026041304
vscode-python-envs	ms-python	1.26.0	ms-python.vscode-python-envs-1.26.0-win32-x64
vscode-spring-boot	vmware	2.2.2026041100	vmware.vscode-spring-boot-2.2.2026041100
vscode-spring-boot-dashboard	vscjava	0.14.2025041702	vscjava.vscode-spring-boot-dashboard-0.14.2025041702
vscode-spring-initializr	vscjava	0.12.0	vscjava.vscode-spring-initializr-0.12.0
vscode-sqlite	alexcvzz	0.14.1	alexcvzz.vscode-sqlite-0.14.1
vscode-tailwindcss	bradlc	0.14.29	bradlc.vscode-tailwindcss-0.14.29
vscode-theme-onedark	akamud	2.3.0	akamud.vscode-theme-onedark-2.3.0
vscode-theme-onelight	akamud	2.3.0	akamud.vscode-theme-onelight-2.3.0
vscode-yaml	redhat	1.22.2026041108	redhat.vscode-yaml-1.22.2026041108
vscodeintellicode-csharp	ms-dotnettools	2.2.3	ms-dotnettools.vscodeintellicode-csharp-2.2.3-win32-x64
winteriscoming	johnpapa	1.4.4	johnpapa.winteriscoming-1.4.4
xlsx-viewer	muhammad-ahmad	1.8.4	muhammad-ahmad.xlsx-viewer-1.8.4
xml	DotJoshJohnson	2.5.1	dotjoshjohnson.xml-2.5.1

C# Settings

Setting	Value
preferCSharpExtension	false
compilerDiagnosticScope	openFiles
analyzerDiagnosticScope	openFiles
enableXamlTools	true
useServerGC	true

System Info

Item	Value
CPUs	AMD Ryzen 3 3250U with Radeon Graphics (4 x 2595)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x1002, DEVICE=0x15d8 [AMD Radeon(TM) Graphics], DRIVER_VENDOR=AMD, DRIVER_VERSION=31.0.21923.11000 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8115 Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	13.88GB (2.21GB free)
Process Argv	--crash-reporter-id b8db6658-0760-4178-8995-053d2f912692
Screen Reader	no
VM	0%

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logging_enabled_new:31490725

[thomas6441code]

C# formatter failed

[JoeRobich]

@thomas6441code Is the code you are hitting this with open source or can you share it? If not, do you think you could try to create a code snippet we could repro with?