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Bryan WilliamsAug 22, 2026 • 4 min read
One conversation, four cards: the dashboard bug with three root causes stacked on top of each other
This is a submission for DEV's Summer Bug Smash: Clear the Lineup powered by Sentry. ...
#devchallenge#bugsmash#debugging#javascript
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Bryan WilliamsAug 23, 2026 • 3 min read
"0 matches" looked like "all clean": the PowerShell filter that couldn't fail loudly
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry. Some bugs crash.....
#devchallenge#bugsmash#powershell#debugging
3 2
John5d ago • 9 min read
The Negative Control That Tested The Wrong Field
A round-trip loader's byte-comparison check turned green to red exactly on cue, but the mutation tha...
#debugging#software#softwareengineering#testing
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Bryan WilliamsAug 22, 2026 • 5 min read
"Trust this file over the exit status": the note our test suite left itself — that nothing ever read
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry. This is the story...
#devchallenge#bugsmash#debugging#node
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Sukhpinder SinghAug 22, 2026 • 4 min read
.NET 10 JSON Console Logging: Stop Parsing State.Message
The .NET 10 JSON console logging change is small enough to miss during an upgrade: the formatted...
#dotnet#csharp#debugging#testing
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Sukhpinder SinghAug 23, 2026 • 4 min read
.NET 10 NU1015: Fix PackageReference Without Version Restore Failures
.NET 10 NU1015 turns a PackageReference without a version into a restore error. I like the stricter....
#dotnet#csharp#devops#debugging
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Sukhpinder Singh6d ago • 3 min read
.NET 10 BufferedStream WriteByte: Flush Full Buffers Explicitly
BufferedStream.WriteByte had a surprising side effect through .NET 9: the call at its internal...
#dotnet#csharp#debugging#testing
5 1
Jahn5d ago • 3 min read
SGLang outputs endless repetition on NVFP4 models: the FP8 lm_head bug
Your NVFP4 model serves fine on vLLM but outputs an endlessly repeated phrase on SGLang, from the...
#llm#gpu#machinelearning#debugging
1 1
John3d ago • 9 min read
The Null Result Belonged To The Other Hypothesis
I ran an experiment to test why some animation frames were rendering empty, got "no change at all," ...
#debugging#programming#software
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Mayank Jain4d ago • 5 min read
The CSP that killed our own form (a production-only Next.js bug)
A user wrote to us with the kind of bug report that makes your stomach drop: "The forgot-password.....
#security#debugging#nextjs#webdev
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John4d ago • 7 min read
Your validator must measure what you ship, not what you loaded
A residual-based honesty gate for a map-comparison renderer rejected an already-published, honest vi...
#codequality#debugging#testing
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JohnAug 25, 2026 • 6 min read
The Upload Succeeded, the Record Did Not
A YouTube upload stage wrote its local "already uploaded" record only after verification succeeded, ...
#api#backend#debugging#softwareengineering
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John6d ago • 10 min read
The Check That Cannot Fire: Absolute Thresholds Silently Disable Your QC
A QC harness passed all 13 synthetic fixtures and broke on 5 of its first real inputs. Every root ca...
#codequality#debugging#softwareengineering#testing
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Codnet Software Company4d ago • 5 min read
Two features were dead in every release build for a month — and worked in every debug build
LongShot is an Android app that stitches a scrolling screen into one long screenshot. Two of its...
#android#kotlin#debugging#programming
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GuAug 24, 2026 • 5 min read
A failed import that still created three records
Every importer has one moment where it tells you it is done. Here is that moment, at the end of a.....
#testing#debugging#webdev#javascript
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Rickesh T NAug 23, 2026 • 4 min read
99% token accuracy, zero learning. Field notes from fine-tuning vision models with RL.
Over the past year I have been fine-tuning open vision-language models - 9B dense up to a 35B...
#machinelearning#ai#llm#debugging
1 3
dustin chuAug 25, 2026 • 3 min read
My agent inflated its own state file to 49MB. Every check passed for three days.
One inverted comparison turned a 13KB file into 893,828 lines. The bug isn't the interesting part — ...
#agents#debugging#python#ai
0 2
Byunghee Kim6d ago • 3 min read
Unread badges that would not clear: 59 of my 64 messages were junk
A chat unread counter that reset itself and came back. Two wrong theories, one SQL query, and a bug ...
#php#debugging#webdev#database
0 1
dustin chu5d ago • 3 min read
I spent two weeks building a content pipeline and then found I had no way to tell if it worked
Automated writing, deploys, verification, syndication. Every step had a check. Nobody had wired up t...
#agents#devops#debugging#ai
0 2
oji - building AI in public5d ago • 3 min read
My Trading Bot Silently Ignored Signals for 41 Days: The "Opportunity vs. Execution" Logging That Saved Me
Hey everyone, it's your resident grandpa-developer here. I develop and run AI-powered automated...
#devops#debugging#python#automation
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Humza Tareen6d ago • 6 min read
When Two Cache Layers Serve Stale Data
Server-side unstable_cache never invalidated by workers plus client-side gcTime replaying old state ...
#caching#nextjs#reactquery#debugging
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ilya mozerov5d ago • 6 min read
A perfect separation in your data is a bug in your instrument
I have a poller that watches a wifi link. Every 60 seconds it asks "are we associated?", and when th...
#monitoring#sre#debugging#observability
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Rulestack5d ago • 4 min read
We rotated a credential and nothing changed: the session cache that outlived its password
Today we rotated a Bluesky app password. We updated the .env, updated the CI secret, re-ran the...
#security#devops#programming#debugging
1 0
GuAug 25, 2026 • 5 min read
My tests could fail. They still could not tell me I was wrong.
A test proves your code does what you meant. It cannot prove that what you meant was correct. I...
#testing#webdev#javascript#debugging
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