Occasional error invalid memory address/nil pointer dereference - codeAction failed

[lukpsaxo]

Stack trace

2026-02-23 14:22:19.625 [error] Request textDocument/codeAction failed.
  Message: InternalError: panic handling request textDocument/codeAction: runtime error: invalid memory address or nil pointer dereference
  Code: -32603 
2026-02-23 14:22:19.627 [info] handled method 'textDocument/codeAction' (8280) in 22.06635s
2026-02-23 14:22:19.627 [error] panic handling request textDocument/codeAction: runtime error: invalid memory address or nil pointer dereference
goroutine 11396082 [running]:
runtime/debug.Stack()
	runtime/debug/stack.go:26 +0x5e
github.com/microsoft/typescript-go/internal/lsp.(*Server).recover(0x170232faae08, {0x7ff6a066cbe5?, 0x1702b4b9d860?}, 0x170351fe0d20)
	github.com/microsoft/typescript-go/internal/lsp/server.go:839 +0x47
panic({0x7ff6a0ec0ae0?, 0x7ff6a1be5940?})
	runtime/panic.go:860 +0x13a
github.com/microsoft/typescript-go/internal/ls/lsconv.(*Converters).LineAndCharacterToPosition(0x17026467cd50, {0x7ff6a1277a68, 0x170292503888}, {0xa06a23c5?, 0x7ff6?})
	github.com/microsoft/typescript-go/internal/ls/lsconv/converters.go:152 +0x60
github.com/microsoft/typescript-go/internal/ls.(*LanguageService).ProvideCodeActions(0x17048f8a5b00, {0x7ff6a127a4d8, 0x1703fae50120}, 0x1702e974b780)
	github.com/microsoft/typescript-go/internal/ls/codeactions.go:86 +0x1c7
github.com/microsoft/typescript-go/internal/lsp.(*Server).handleCodeAction(0x170233178000?, {0x7ff6a127a4d8?, 0x1703fae50120?}, 0x1705626b7a40?, 0x55?)
	github.com/microsoft/typescript-go/internal/lsp/server.go:1245 +0x25
github.com/microsoft/typescript-go/internal/lsp.init.func1.registerLanguageServiceWithAutoImportsRequestHandler[...].29.1()
	github.com/microsoft/typescript-go/internal/lsp/server.go:750 +0x237
github.com/microsoft/typescript-go/internal/lsp.(*Server).handleRequestOrNotification.func1()
	github.com/microsoft/typescript-go/internal/lsp/server.go:579 +0x95
github.com/microsoft/typescript-go/internal/lsp.(*Server).dispatchLoop.func3()
	github.com/microsoft/typescript-go/internal/lsp/server.go:454 +0x2c
created by github.com/microsoft/typescript-go/internal/lsp.(*Server).dispatchLoop in goroutine 10
	github.com/microsoft/typescript-go/internal/lsp/server.go:453 +0x4ac

2026-02-23 14:22:19.627 [error] Request textDocument/codeAction failed.
  Message: InternalError: panic handling request textDocument/codeAction: runtime error: invalid memory address or nil pointer dereference
  Code: -32603 

Steps to reproduce

I don't have clear repro steps. I was in a file importing a file that was missing (I had accidentally deleted) and I ran git checkout so the file (a json file) became available.

But I can't reproduce. I've seen what might be the same error last week - so its very occasional and not very reproducible.

If the stack trace can't help, please close the issue.