dct: visualize on compilation failure

src/app/dct/dct.component.ts

@@ -147,8 +147,9 @@ export class DCTComponent implements OnInit, AfterViewInit {
         verbose: true,
         debug: debug,
       });
-    } catch (e) {
+    } catch (e: any) {
       console.error(e);
+      this.schemaOutput = e.stdout ?? String();
       return false;
     }
 
@@ -158,9 +159,13 @@ export class DCTComponent implements OnInit, AfterViewInit {
   }
 
   public async visualizeSchema() {
-    if (await this.compileSchema(true)) {
+    await this.compileSchema(true);
+
+    // Check if output contains a DAG
+    // This can be the case even if the compiler fails
+    if (this.schemaOutput.includes('digraph')) {
       this.refreshVisualizer();
-      this.tabs.set(this.visualizerTab)
+      this.tabs.set(this.visualizerTab);
     }
   }
 

src/app/wasm.service.ts

@@ -152,11 +152,17 @@ export class WasmService {
    */
   public async stdout(fun: WasmFunction, ...args: Parameters<WasmFunction>): Promise<string> {
     const stdout: string[] = [];
-    await fun(args[0], {
-      ...args[1] ?? {},
-      print: (line) => stdout.push(line) && window.console.log_play(line),
-    });
-    return stdout.join('\n');
+    try {
+      await fun(args[0], {
+        ...args[1] ?? {},
+        print: (line) => stdout.push(line) && window.console.log_play(line),
+      });
+
+      return stdout.join('\n');
+    } catch (e: any) {
+      e.stdout = stdout.join('\n');
+      throw e;
+    }
   }
 
   /**