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getCallerUrl fallback to avoid invalid URL error #20

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getCallerUrl fallback to avoid invalid URL error #20

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12 changes: 8 additions & 4 deletions mod.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -108,10 +108,10 @@ const esbuildOptions: webAssemblyEsbuild.BuildOptions = {
}),
};

const AsyncFunction = async function () {}.constructor;
const AsyncFunction = async function() { }.constructor;

function customPrepareStackTrace(_error: Error, callSites: CallSite[]) {
return callSites.at(2)!.getFileName();
return callSites[2] && callSites[2].getFileName();
}

function getCallerUrl() {
Expand All @@ -120,12 +120,16 @@ function getCallerUrl() {
Error.stackTraceLimit = Infinity;
Error.prepareStackTrace = customPrepareStackTrace;

const callerUrl = new URL(new Error().stack!);
const callerFile = new Error().stack;

Error.stackTraceLimit = stackTraceLimit;
Error.prepareStackTrace = prepareStackTrace;

return callerUrl;
if (callerFile) {
return new URL(callerFile);
} else {
return new URL(import.meta.url);
}
}

async function buildAndEvaluate(
Expand Down