Rebounder Tech Blog

Written by the people who actually run these systems in production.

Find it by the error string

The error you typed into the search box may be right here.
Everything listed actually appeared in our own production systems.This is not a list assembled from guesswork.

Constants & code

FLAG_KEEP_SCREEN_ON
insetsController Is null Before setContentViewOne startActivity Is Not Enough to Blank a Kiosk ScreenAn Android Foreground Service Can Die Without CrashingFLAG_KEEP_SCREEN_ON Ignored: It's the Screensaver
NODE_ENV
Missing frame-src in CSP Blocks YouTube, Kills Watch LogsA New httpOnly Cookie 401s Only Already-Logged-In Userspdfjs-dist standard_fonts Missing From standalone
EMPTY_PLAN
Remounting a Form by key Resets Uncontrolled InputsHalf-Controlled Forms Silently Revert on Resubmit
ADMIN_API_KEY
proxy.ts Redirected API-Key Endpoints to the Login Page
APP_ENV
LIMIT 1 Without ORDER BY Returns Another Tenant
APP_URL
Auth Middleware Redirects robots.txt to the Login Page
AUDIT_FK_SQL
RLS Allowing actor_user_id NULL Erases Audit Trails
AUDIT_LOG_ACTOR_NULL_SQL
RLS Allowing actor_user_id NULL Erases Audit Trails
AUDIT_TRIGGER_SQL
RLS Allowing actor_user_id NULL Erases Audit Trails
BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
insetsController Is null Before setContentView
CHECKOUT_EXPIRY_BUFFER_SECONDS
Omitting expires_at Holds a Seat for 24 Hours
CHECKOUT_HOLD_MINUTES
Omitting expires_at Holds a Seat for 24 Hours
CHECKOUT_SESSION_ID
Omitting expires_at Holds a Seat for 24 Hours
COOKIE_NAME
A New httpOnly Cookie 401s Only Already-Logged-In Users
DATABASE_URL
Missing passThroughEnv Skips Tests While CI Stays Green
DEV_LOGIN_CONFIG
LIMIT 1 Without ORDER BY Returns Another Tenant
DEVLOGIN_TEST
LIMIT 1 Without ORDER BY Returns Another Tenant
DEVLOGIN_TEST_SCHOOL_ID
LIMIT 1 Without ORDER BY Returns Another Tenant
EMBED_BATCH_SIZE
A Non-Numeric env Becomes NaN and Slips Past ??
EMPTY_DRAFT
Half-Controlled Forms Silently Revert on Resubmit
FEED_MEXT
Duplicate URLs in a Feed Break ON CONFLICT DO UPDATE
FLAG_ACTIVITY_CLEAR_TOP
One startActivity Is Not Enough to Blank a Kiosk Screen
FLAG_ACTIVITY_NEW_TASK
One startActivity Is Not Enough to Blank a Kiosk Screen
FLAG_FULLSCREEN
insetsController Is null Before setContentView
FLAG_SHOW_WHEN_LOCKED
insetsController Is null Before setContentView
GEMINI_THINKING_BUDGET
Gemini Thinking Tokens Eat maxOutputTokens
ISO_DATETIME_RE
Only the Poll Stringifies Date: getTime Is Not a Function
ITEM_A
Duplicate URLs in a Feed Break ON CONFLICT DO UPDATE
ITEM_B
Duplicate URLs in a Feed Break ON CONFLICT DO UPDATE
KIMITERRACE_TEST_DB_OK
Missing passThroughEnv Skips Tests While CI Stays Green
MAX_TOTAL_UPLOAD_BYTES
bodySizeLimit Alone Isn't Enough, Hits the Error Boundary
MIN_TEACHER_PASSWORD_LENGTH
auth/invalid-password: App Allowed Shorter Passwords
NEXT_RUNTIME
pdfjs-dist standard_fonts Missing From standalone
NOTICE_ASSIST_STREAM_SYSTEM
Aborting streamObject Leaves usage as an Unhandled Rejection
PAGE_CASES
Fixing a detect-non-literal-regexp False Positive
PATTERN_BLOCKS
Hand-Built Preview Payload Drifts From the Device
PDF_MEDIA_TYPE
Routing Scanned PDFs to Gemini by Chars per Page
PIN_C10
What Stops You First in Quartus Is the Setup
PRESET_FIELDS
Remounting a Form by key Resets Uncontrolled Inputs
PUBLISHER_ROLES
Narrowing a Page's Roles Left the Action's Gate
RAILWAY_FETCH_TIMEOUT_MS
A Non-Numeric env Becomes NaN and Slips Past ??
RESTART_COOLDOWN_MS
An Android Foreground Service Can Die Without Crashing
RLS_ENABLE_SQL
RLS Allowing actor_user_id NULL Erases Audit Trails
RLS_POLICIES_SQL
RLS Allowing actor_user_id NULL Erases Audit Trails
RLS_TESTS_SKIP
Missing passThroughEnv Skips Tests While CI Stays Green
SCANNED_PDF_MAX_NONWS_CHARS_PER_PAGE
Routing Scanned PDFs to Gemini by Chars per Page
SCHOOL_ID
Removing a Role-Change Seam With No Callers Left
SDK_INT
insetsController Is null Before setContentView
SEED_AD_MEDIA_BASE
A staging Default in env Deleted Production Images
STALE_THRESHOLD_MS
An Android Foreground Service Can Die Without Crashing
STANDARD_FONT_FILE_RE
pdfjs-dist standard_fonts Missing From standalone
STREAM_STALL_MS
Aborting streamObject Leaves usage as an Unhandled Rejection
SYSTEM_ADMIN_ROLES
Narrowing a Page's Roles Left the Action's Gate
SYSTEM_ALERT_WINDOW
One startActivity Is Not Enough to Blank a Kiosk Screen
TTL_MS
A New httpOnly Cookie 401s Only Already-Logged-In Users
VERSION_CODES
insetsController Is null Before setContentView
WRITE_SECURE_SETTINGS
FLAG_KEEP_SCREEN_ON Ignored: It's the Screensaver
WRITE_SETTINGS
FLAG_KEEP_SCREEN_ON Ignored: It's the Screensaver

PostgreSQL

23505
A 23503 FK Violation Disguised as a ConflictA Ledger INSERT Failure Swallowed as a DuplicateA Conditional UPDATE Needs error, Not Just data
23503
A 23503 FK Violation Disguised as a Conflict
23514
A 23503 FK Violation Disguised as a Conflict

Exceptions & failures

TypeError
Only the Poll Stringifies Date: getTime Is Not a FunctionNext.js Bundling a wasm Package Breaks Only in Production
CancellationException
An Android Foreground Service Can Die Without Crashing
DrizzleQueryError
A 23503 FK Violation Disguised as a Conflict
ForbiddenError
Narrowing a Page's Roles Left the Action's Gate
LegacyContentConfigError
Astro 7 Breaks Content Collections in Three Places
SecretsAccessCheckFailed
Enabling a Cloud Run Job Fails With SecretsAccessCheckFailed
SecurityException
FLAG_KEEP_SCREEN_ON Ignored: It's the Screensaver
StripeCardError
A Post-Charge DB Failure Read as a Card Decline
UnauthenticatedError
Narrowing a Page's Roles Left the Action's Gate
UnknownErrorException
pdfjs-dist standard_fonts Missing From standalone

Firebase

auth/admin-mutations
Removing a Role-Change Seam With No Callers Left
auth/invalid-password
auth/invalid-password: App Allowed Shorter Passwords
auth/update-password
proxy.ts Redirected API-Key Endpoints to the Login Page
auth/weak-password
auth/invalid-password: App Allowed Shorter Passwords

PostgREST

PGRST116
maybeSingle() Throws PGRST116 on a Too-Loose Filter

This index is extracted mechanically from the article bodies. It grows as articles are added.