[Bug] "Object is possibly 'undefined'" in hint-compat [0.1]

[molant]

When I try to build hint-compat-api I get a "Object is possibly 'undefined'" error in getProblemLocationFromNode

private getProblemLocationFromNode(node: ChildNode): ProblemLocation | undefined {
        const start = node.source.start;

        if (!start) {
            return undefined;
        }

        return {
            column: start.column - 1,
            line: start.line - 1
        };
    }

It happens in 2 separate machines. @borgitas21, @antross can you please confirm and do a PR with a fix (don't know if just adding !) is enough in this situation.

Thank you!

[antross]

At first glance this looks like an issue due to a change in type definitions in a patch update of postcss. It just bumped to 7.0.8 two days ago (we reference 7.0.7).

I should have a PR ready shortly.

[antross]

For reference, here's the PR that broke us (released as part of postcss 7.0.8):
postcss/postcss#1217

It corrects the type definitions to match what postcss was already doing in previous versions (they were out-of-sync).