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fix: prevent crash in buildLocation when params stringification fails (#6310) #6349

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fix: prevent crash in buildLocation when params stringification fails (#6310) #6349

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6 changes: 5 additions & 1 deletion packages/router-core/src/router.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1701,7 +1701,11 @@ export class RouterCore<
const fn =
route.options.params?.stringify ?? route.options.stringifyParams
if (fn) {
Object.assign(nextParams, fn(nextParams))
try {
Object.assign(nextParams, fn(nextParams))
} catch (err) {
//
}
Comment on lines +1704 to +1708
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@coderabbitai coderabbitai bot Jan 10, 2026

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⚠️ Potential issue | 🟠 Major

Add logging for stringify failures to aid debugging.

While preventing crashes is the right approach for resilience, the empty catch block makes it difficult to diagnose when and why parameter stringification fails. This could hide bugs or configuration issues that developers need to be aware of.

Consider logging the error at least in development mode:

🔍 Proposed enhancement to add development logging 
 try {
   Object.assign(nextParams, fn(nextParams))
 } catch (err) {
-  //
+  if (process.env.NODE_ENV !== 'production') {
+    console.warn(
+      `Failed to stringify params for route ${route.id}:`,
+      err,
+    )
+  }
 }

This maintains the crash prevention while providing visibility into stringify failures during development.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
try {
Object.assign(nextParams, fn(nextParams))
} catch (err) {
//
}
try {
Object.assign(nextParams, fn(nextParams))
} catch (err) {
if (process.env.NODE_ENV !== 'production') {
console.warn(
`Failed to stringify params for route ${route.id}:`,
err,
)
}
}
🤖 Prompt for AI Agents 
In @packages/router-core/src/router.ts around lines 1704 - 1708, The empty catch
swallowing errors in the try around Object.assign(nextParams, fn(nextParams))
hides stringify failures; update the catch to log the error (including the error
object and relevant context such as nextParams and fn.name or a stringified fn)
so developers can debug, using the router's existing logger if available (e.g.,
this.logger or a module logger) or fallback to console.error, and guard the log
behind a development check (e.g., process.env.NODE_ENV !== 'production' or an
existing debug flag) so production noise is avoided.

}
}
}
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