Production Bugs

git fetch origin master:master does not advance origin/master, but it does advance FETCH_HEAD

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Unexpected Behavior Analysis: git fetch origin master:master Does Not Update origin/master Summary Executing git fetch origin master:master failed to update origin/master despite fetching new commits The operation showed ! [rejected] master -> master (non-fast-forward) and created new tags FETCH_HEAD was successfully updated with the latest commit Running git fetch origin master later updated origin/master as … Read more

Google Sheets multiple scripts

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# Google Sheets Multiple Scripts: Resolving Conflicting `onEdit` Triggers ## Summary – Three separate functions named `onEdit` were implemented to handle spreadsheet edits – Conflicting trigger definitions caused only the final `onEdit` implementation to execute – Attempts to rename functions broke trigger registration while maintaining name collisions – Resolution required merging all logic into a … Read more

info.remote_addr() – method not found in warp::log::Info

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# `info.remote_addr()` – Method Not Found in warp::log::Info: A Production Postmortem ## Summary A compilation error occurred when using `info.remote_addr()` within `warp::log::custom`. The method `remote_addr` is absent in `warp::log::Info`, causing the Rust compiler to reject the code. The issue stems from API differences between Warp’s logging middleware and remote address extraction. ## Root Cause * … Read more

Laravel teardown API calls on reversing migration

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# Laravel Migration Rollbacks Fail to Trigger Model Deletion Events ## Summary – Model deletion events (`deleting`/`deleted`) are not triggered during Laravel migration rollbacks when using `Schema::drop()` or `Schema::dropIfExists()`. – This occurs because table dropping bypasses Eloquent model hooks and executes SQL-level `DROP TABLE` commands. – External API cleanup logic attached to model events fails … Read more

Should I return LaTeX format for math formulas in a REST API?

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# API Design Postmortem: Handling Math Formulas in REST Responses ## Summary – A quiz application API returned mathematical formulas exclusively in LaTeX format within JSON payloads – This design forced clients to implement LaTeX rendering regardless of their capabilities – Scalability concerns emerged due to varied client requirements and rendering complexity ## Root Cause … Read more

How to prevent race condition in AWS DynamoDB and Lambda

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# Preventing Race Conditions in AWS DynamoDB with Lambda and Kinesis Pipelines ## Summary A pipeline processes DynamoDB updates via Kinesis and Lambda functions: – **Lambda A** reads items and publishes versioned events (`{key, version, …}`) to Kinesis – Kinesis partitions events by key – **Lambda B** consumes events and writes updates to DynamoDB **Problem:** … Read more

Spatial aliasing appearing on grid lines using GLSL with mod(), dFdx and dFdy functions as distance functions

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# Spatial Aliasing on Grid Lines in GLSL: A Postmortem ## Summary – Grid lines rendered with a GLSL fragment shader exhibit jagged triangular artifacts (“spatial aliasing”) – Occurs when computing grid line visibility using `mod()`, `dFdx`, and `dFdy` as distance estimators – Aliasing manifests as sawtooth patterns along grid lines when camera isn’t axis-aligned … Read more

How to set sub-forms Record Source base on a combo box on the main form

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# Postmortem: Subform RecordSource Update Failure in MS Access Production Database ## Summary A production database form stopped updating inspection questions after combobox selections. The main form (`frm_Inspections`) contained a combobox for inspection types, with a subform (`sub_Questions`) that should dynamically switch between four tables sharing identical schemas. Despite multiple attempts, the RecordSource change wasn’t … Read more

How to assign controller devices to espicially selected characters with enhanced input on unreal engine5?

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# Controller Assignment Failures in UE5 Multiplayer Fighting Game ## Summary Failure to assign distinct input devices (gamepad/keyboard) to specific characters in a 2.5D fighter resulted in both devices controlling Player 1. Implemented explicit controller-device assignment via Player Controller initialization and Enhanced Input subsystem separation. ## Root Cause – Unreal Engine’s default behavior binds all … Read more

How to force chained method calls to remain multiline using “ruff format”?

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# Postmortem: Ruff Format Collapsing Multi-Line Chained Method Calls Against Developer Intent ## Summary • Ruff formatter unexpectedly collapsed multiline chained method calls into a single line • Attempts to use `preview = true` and adjust `pyproject.toml` configuration didn’t preserve desired formatting • Behavior occurred inconsistently based on trailing comments or argument length ## Root … Read more