Inherited codebases
The code below the return statement
Five templates where every edit we made was being thrown away, and nothing told us.
Published 24 August 2026
5templates silently discarding edits
Context
Every change we made to the storefront's commerce templates had no effect. Not the wrong effect, no effect. The file saved, the deploy succeeded, and the page rendered exactly as before.
The constraint
The obvious suspects were all clean: no caching, correct file, right theme. A change that produces literally nothing leaves no stack trace and no failing test to work from. You're debugging an absence.
What we built
- Read the templates top to bottom instead of jumping to the section being edited, and found an early return sitting mid-file with live-looking code beneath it.
- Confirmed the same pattern across five commerce templates: a substantial block of code in each that could never execute.
- Documented each occurrence with its line number rather than silently deleting, so the history of what was dead and why stayed visible.
- Restructured the templates so the reachable code is the code you see, and future edits land where the author expects.
The result
Clearing the dead code below the early returns in all five templates made edits take effect again and eliminated an entire category of wasted debugging: nobody has since lost an afternoon to a change that was never going to run.
What we'd do differently
Read the whole file before the first edit. It costs a few minutes and it would have caught this immediately, and it's now standard practice on every codebase we inherit.
Why this matters for you: The biggest fear in handing over an existing site is that whoever takes it will rewrite what they don't understand. Reading inherited code carefully, rather than replacing it, is the difference between a safe handover and an expensive one.