Update roslyn to 5.12.0-1.26455.3

[davidwengier]

View Complete Diff of Changes

• Import EditorConfig templates from dotnet/templates (PR: #85157)
• Improve parser recovery for misplaced 'partial' modifiers (PR: #83216)
• Add instructions for how to build with analyzers (PR: #83228)
• Make VB SDK samples strict (Option Strict On) (PR: #85124)
• Sync FBA sources (PR: #85065)
• Record partial lambda parsing baselines (PR: #85166)
• Visit left operand conversion in a fast path of nullable analysis (PR: #85115)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 8742256 (PR: #799)
• Fix EditorConfig at solution level (PR: #782)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 6347393 (PR: #678)
• enable nullable (PR: #692)
• Fix a NullReferenceException in the DeclarePublicAPI analyzer (PR: #677)
• Merge pull request Have a keyboard shortcut for the yellow bulb options (help) #644 from jmarolf/features/update-default-editorconfig-settings (PR: #644)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4901452 (PR: #511)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4901402 (PR: #510)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4900535 (PR: #509)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4905189 (PR: #512)
• Set VSSDKTargetPlatformRegRootSuffix (PR: #461)
• Update VS SDK (PR: #487)
• Update VSSDK (PR: #479)
• Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4718492 (PR: #478)
• Fix Editor config issues (PR: #206)
• fix EditorConfig templates names (PR: #193)
• Fix vs dev (PR: #134)
• Add new classlib templates (PR: #132)
• do not build tasks and use nuget package instead (PR: #92)
• move-to-arcade (PR: #90)
• Correcting two option names
  (PR: #83)
• Trim trailing whitespace in EditorConfig item templates (PR: #73)
• Update editorconfig default name (PR: #65)
• Fix access to resources (PR: #64)
• LOC CHECKIN | dotnet/templates master | 20180629 (PR: #61)
• adding VB editorconfig templates (PR: #56)
• Merge dev15.8 preview2 to master (PR: #55)
• fix setup (PR: #54)
• Merges/dev15.8 preview2 to master (PR: #52)
• Update setup authoring (PR: #50)
• Merges/dev15.7.x to dev15.8 preview2 (PR: #48)
• reset to defaults (PR: #47)
• Fix aspnet node order (PR: #46)
• Merges/dev15.8 preview2 to master (PR: #45)
• Refactor (PR: #44)
• update vb authoring (PR: #41)
• adding localized resources (PR: #40)
• fixing Kaseys comments (PR: #39)
• Editorconifg changes (PR: #38)

[Copilot]

🟡 Changes recommended

The 2.152.x changelog now contains two “Update Roslyn to …” entries, making the shipped Roslyn version and associated sub-bullets ambiguous.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Updates the VS Code C# extension’s pinned Roslyn component version to 5.12.0-1.26455.3, and records the update in the changelog for the current prerelease line.

Changes:

• Bump the default Roslyn version in package.json to 5.12.0-1.26455.3.
• Add a corresponding entry in CHANGELOG.md under 2.152.x.

File summaries

File	Description
package.json	Updates the extension’s default Roslyn version to 5.12.0-1.26455.3.
CHANGELOG.md	Adds a 2.152.x changelog entry for the Roslyn bump (currently duplicated with the prior Roslyn update entry).

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Lite

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[davidwengier]

Looks like changes here were all compiler, plus the templates repo move, so change log is non-existent.

[Copilot]

🟢 Approval recommended

The change is a straightforward, internally consistent Roslyn version bump with a corresponding changelog update and no remaining references to the prior version.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0 new
• Review effort level: Lite

[Copilot]

🔵 Needs a closer look

Dependency bumps to Roslyn can have broad runtime/behavioral impact that isn’t fully verifiable from the diff alone without end-to-end validation signals.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0 new
• Review effort level: Lite

[davidwengier]

@jjonescz @RikkiGibson Please check the last commit, it makes the linux tests pass, but I'm not sure if this is hiding a bug in file based apps that you might want to know about.