Formatting razor document fails

[pmmoli]

Type: Bug

Issue Description

formatting razor document fails

Steps to Reproduce

Installed and uninstalled Prettier and CSharpier, try to format razor document

Expected Behavior

formats document

Actual Behavior

error:
2026-04-07 14:18:20.164 [error] Request textDocument/formatting failed.

Message: The changes must not overlap. (Parameter 'changes')

VS Code version: Code 1.114.0 (e7fb5e9, 2026-04-01T09:27:11Z)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 9 5900X 12-Core Processor (24 x 3700)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x1002, DEVICE=0x744c [AMD Radeon RX 7900 GRE], DRIVER_VENDOR=AMD, DRIVER_VERSION=32.0.23033.1002 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 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)	31.93GB (14.78GB free)
Process Argv	--crash-reporter-id eeddfd8e-66d1-4cd0-b03f-b0c7e15fdbfc
Screen Reader	no
VM	0%

Extensions (11)

Extension	Author (truncated)	Version
gitignore	cod	0.10.0
vscode-markdownlint	Dav	0.61.2
copilot-chat	Git	0.42.3
vscode-github-actions	git	0.31.3
geminicodeassist	goo	2.77.0
vscode-dbml	mat	0.4.1
csdevkit	ms-	3.10.14
csharp	ms-	2.130.5
vscode-dotnet-runtime	ms-	3.0.0
vscode-xml	red	0.29.0
dftemplate	the	0.19.1

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