nlohmann/json · OSS Lab

update() parent pointers not updated after recursive merge with JSON_...

Visible upstream regression test fails on the parent snapshot

lockNot currently playableNeeds packaging

MediumDate/TimeNeeds packaging

OSS Labs are training exercises derived from public open-source bug-fix history. Completing a lab is not an upstream contribution or merged PR. Buglyst is not affiliated with these projects.

584e6b1Source commit

a69a42aParent commit

MITLicense

1,205Repo scale · upstream filesPackaged snapshot: 331 files

123,758Visible LOC

~30mEst. time

What this lab trains

checkRepository navigation

checkFailing test reproduction

checkRoot cause tracing

checkMinimal patch reasoning

checkPR-style explanation

Failing signal

What you’ll see when you run the visible regression test.

SymptomVisible upstream regression test fails on the parent snapshotEntry point hintStart at tests/src/unit-diagnostics.cpp.

PR-style report (preview)

The structured report you produce on accept. This is the format, not a real completion.

differencePR-STYLE REPORT

Sample format

update() parent pointers not updated after recursive merge with JSON_...nlohmann/json

Problem

A regression reproduced from public bug-fix history causes a visible test to fail on the parent snapshot.

Root cause

Written by you, in your own words, after tracing the failing test into the runtime source. (Filled in from your submission — not provided here.)

Fix summary

A minimal patch that makes the visible regression test pass without breaking neighbouring behaviour.

Files changed

descriptiontest/<regression>.test.js
descriptionlib/<runtime-source>.js

Files inspected

descriptiontest/<regression>.test.js
descriptionlib/<runtime-source>.js

Tests run

terminalVisible regression test
terminalHidden edge-case validation

Validation result

Visible checks: pendingHidden validation: pending

Resume-safe summary

Completed an OSS-backed Buglyst debugging lab based on public bug-fix history: reproduced a failing test, traced the root cause, and shipped a minimal patch that passed visible and hidden validation. Not an upstream contribution.

OSS Labs are training exercises derived from public open-source bug-fix history. Completing a lab is not an upstream contribution or merged PR. Buglyst is not affiliated with these projects.