Symbolicating a minified stack trace by hand: why source maps can't do it alone

Source maps alone cannot fully recover original function names from minified stack traces—they can pinpoint the exact file, line, and column of errors but fail to restore the correct function names. To properly symbolicate production errors, exception tracking platforms must also parse the minified bundle itself, which is why services like Sentry require both the source map and the bundle to be uploaded. The author demonstrates this limitation by manually decoding a minified JavaScript stack trace, showing that a three-step algorithm combining source map data and bundle analysis is necessary to achieve accurate symbolication.