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-rw-r--r--js/runtime.ts2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/runtime.ts b/js/runtime.ts
index 9a3302d64..2809ebdf8 100644
--- a/js/runtime.ts
+++ b/js/runtime.ts
@@ -170,7 +170,7 @@ export function resolveModule(
// Assets are compiled into the runtime javascript bundle.
const moduleId = moduleSpecifier.split("/").pop();
const assetName = moduleId.includes(".") ? moduleId : `${moduleId}.d.ts`;
- util.assert(assetName in assetSourceCode);
+ util.assert(assetName in assetSourceCode, `No such asset "${assetName}"`);
sourceCode = assetSourceCode[assetName];
filename = ASSETS + assetName;
} else {