Whose Error Is It?
75 errors, who printed each
The pool behind the daily game. Each page says what the error means and the first thing to check. Want the game? Play today's five.
Python
- TypeError: 'NoneType' object is not subscriptable
- ModuleNotFoundError: No module named 'requests'
- IndentationError: unexpected indent
- KeyError: 'id'
- UnboundLocalError: local variable 'total' referenced before assignment
- RecursionError: maximum recursion depth exceeded
- TypeError: unsupported operand type(s) for +: 'int' and 'str'
Node.js
- TypeError: Cannot read properties of undefined (reading 'map')
- ReferenceError: window is not defined
- Error: listen EADDRINUSE: address already in use :::3000
- FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
- Error [ERR_REQUIRE_ESM]: require() of ES Module not supported
- SyntaxError: Unexpected token < in JSON at position 0
- Error: Cannot find module 'express'
TypeScript
- error TS2322: Type 'string' is not assignable to type 'number'.
- error TS2532: Object is possibly 'undefined'.
Go
- panic: runtime error: invalid memory address or nil pointer dereference
- fatal error: all goroutines are asleep - deadlock!
- declared and not used: x
- import cycle not allowed
- panic: assignment to entry in nil map
Rust
- error[E0382]: borrow of moved value: `s`
- error[E0499]: cannot borrow `v` as mutable more than once at a time
- thread 'main' panicked at 'called `Option::unwrap()` on a `None` value'
- error[E0106]: missing lifetime specifier
Java
- Exception in thread "main" java.lang.NullPointerException
- java.lang.OutOfMemoryError: Java heap space
- Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
- java.lang.UnsupportedClassVersionError: has been compiled by a more recent version of the Java Runt.
C#
- System.NullReferenceException: Object reference not set to an instance of an object.
- error CS0103: The name 'foo' does not exist in the current context
- System.InvalidOperationException: Sequence contains no elements
PHP
- Fatal error: Uncaught Error: Call to undefined function mysqli_connect()
- Warning: Cannot modify header information - headers already sent by
- Parse error: syntax error, unexpected '}'
- Fatal error: Allowed memory size of 134217728 bytes exhausted
Ruby
- NoMethodError: undefined method `name' for nil:NilClass
- LoadError: cannot load such file -- bundler/setup
- ActiveRecord::RecordNotFound: Couldn't find User with 'id'=42
C or C++
- terminate called after throwing an instance of 'std::bad_alloc'
- error: expected ';' before '}' token
- error: 'cout' was not declared in this scope
Swift
Postgres
- ERROR: relation "users" does not exist
- ERROR: duplicate key value violates unique constraint "users_pkey"
- FATAL: password authentication failed for user "postgres"
- ERROR: deadlock detected
- ERROR: column "name" must appear in the GROUP BY clause or be used in an aggregate function
- ERROR: syntax error at or near "FROM"
Redis
- MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk.
- OOM command not allowed when used memory > 'maxmemory'.
- WRONGTYPE Operation against a key holding the wrong kind of value
Kubernetes
- CrashLoopBackOff
- Back-off pulling image: ImagePullBackOff
- 0/3 nodes are available: 3 Insufficient cpu.
Docker
- Error response from daemon: Conflict. The container name "/web" is already in use
- Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
- failed to solve: failed to compute cache key: "/package.json" not found
nginx
- 502 Bad Gateway nginx/1.18.0
- upstream timed out (110: Connection timed out) while reading response header from upstream
- client intended to send too large body: 2097152 bytes
Cloudflare
- Error 1101: Worker threw exception
- Error 1015: You are being rate limited
- Error 522: Connection timed out
- Error: Too many subrequests by single Worker invocation.
AWS
- An error occurred (AccessDenied) when calling the PutObject operation: Access Denied
- ThrottlingException: Rate exceeded
Git
- error: failed to push some refs to 'origin'
- fatal: refusing to merge unrelated histories
- You are in 'detached HEAD' state.
- CONFLICT (content): Merge conflict in README.md
npm
- npm ERR! ERESOLVE unable to resolve dependency tree
- npm ERR! EACCES: permission denied, mkdir '/usr/local/lib/node_modules'
Bash