[Bug] Illegal value for lineNumber

[joecarl]

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.52.0#XQAAAAIkAgAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscw0kd0FVciAJM8XEuX7Os378jBGtVLkr6ryuhqvky-XZ9Sy0vyFSI1m9lYQpwqOsaKmhydYWIo-9hGbv_4wlPIsEpVooDN3UCgYV8kLlvOGD8rooZ1WJ_A9v5uEdBOb0AipkE4nFHt4fpakpkyG-1p7O0Lqu0PLvpSZ-3czGDL5Ch4Rq5b3TwBB3i3RQ8ipOflrAzAJPxJXesguDmuXGiOs8DBjdIHDXn-9abB035-a5xuJsBfqx0optiY_XFBiwyMG4FfmSnqz13FpC3GYYZNpzBdgbnYxXgg2V5Eh1f_7ytxGQ

Monaco Editor Playground Code

const originalModel = monaco.editor.createModel(
	/* set from `originalModel`: */ `hello world`,
	"text/plain"
);
const modifiedModel = monaco.editor.createModel(
	/* set from `modifiedModel`: */ `hello world
hello world
hello world`,
	"text/plain"
);

const diffEditor = monaco.editor.createDiffEditor(
	document.getElementById("container"),
	{
		originalEditable: true,
		automaticLayout: true,
	}
);
diffEditor.setModel({
	original: originalModel,
	modified: modifiedModel,
});

Reproduction Steps

Select lines 2 and 3 in the right editor and then hit Del key.

Actual (Problematic) Behavior

Removing lines in any diff editor raises the Illegal value for lineNumber error under some circumstances.

Expected Behavior

No response

Additional Context

Using version 0.52.0
This error doesn't happen with version 0.51.0