How should I get the error message

1 
import { syntaxTree } from "@codemirror/language";
import { linter, type Diagnostic } from "@codemirror/lint";
const ipfLinter = linter((view) => {
    const diagnostics: Diagnostic[] = [];
    if(view.state.doc['text'][0].trim() === '') {
        return;
    }
    console.log(syntaxTree(view.state))
    syntaxTree(view.state)
        .cursor()
        .iterate((node) => {
            if (node.type.isError) {
                diagnostics.push({
                    from: node.node.parent.from,
                    to: node.node.parent.to,
                    severity: "warning",
                    message: "Error",
                });
            }
        });
    return diagnostics;
});

I know there’s an error here when ‘node.type.isError === true’ but don’t know why it’s happening.
How should I get the error message

2

There is no error message. Lezer trees just have these markers where they corrected some parse failure, they don’t generate or store messages.

3

Thanks Reply！
Is there any way to get these error messages, because I need to provide users with error reasons and suggestions for modification :smiley: