From 84390b67133db7708a21f84b509af5395bfd9ea6 Mon Sep 17 00:00:00 2001
From: Henning Dieterichs <henning.dieterichs@live.de>
Date: Sun, 29 Mar 2020 15:07:38 +0200
Subject: [PATCH] Catches visualization errors.

---
 webview/src/components/Visualizer.tsx | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/webview/src/components/Visualizer.tsx b/webview/src/components/Visualizer.tsx
index 876d897..2507f01 100644
--- a/webview/src/components/Visualizer.tsx
+++ b/webview/src/components/Visualizer.tsx
@@ -12,6 +12,11 @@ export class Visualizer extends React.Component<{ model: Model }> {
 		);
 	}
 
+	componentDidCatch() {
+		this.props.model.setVisualizationError({ kind: {} });
+		console.log("broken");
+	}
+
 	renderContent(): JSX.Element {
 		const s = this.props.model.state;
 		if (s.kind === "loading") {
@@ -24,6 +29,8 @@ export class Visualizer extends React.Component<{ model: Model }> {
 			);
 		} else if (s.kind === "noExpression") {
 			return <NoData>No Expression Entered</NoData>;
+		} else if (s.kind === "visualizationError") {
+			return <NoData>Visualization Error</NoData>;
 		} else if (s.kind === "noDebugSession") {
 			return <NoData>No Active Debug Session</NoData>;
 		} else if (s.kind === "data") {
@@ -32,7 +39,19 @@ export class Visualizer extends React.Component<{ model: Model }> {
 				return <NoData>No Visualization Available</NoData>;
 			}
 
-			return vis.visualization.render();
+			try {
+				return vis.visualization.render();
+			} catch (e) {
+				console.error(e);
+				return (
+					<NoData>
+						<>
+							Visualization Error
+							<pre>{e.message}</pre>
+						</>
+					</NoData>
+				);
+			}
 		} else {
 			const nvr: never = s;
 			return <div />;