ErrLookup › biomejs/biome

biomejs/biome

A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP. · Rust · 4,515 source files

Analyzed at 17a2560fb5 on 2026-09-20. 76 documented errors.

Code / Message	Type	Severity	Tags
TailwindSyntaxVisitor only emits Tailwind class strings	panic	error	rust, panic, lint, tailwind, invariant
has size , expected	validation	error	unicode, codegen, integrity-check, file-size, build-tooling
Unexpected attribute	exception	error	rust, proc-macro, compile-time, deserializable, attributes
metavariable members are not supported in the Error global	validation	error	codegen, build, typescript
`ConnectionReset` the server process exited before the connection could be established	exception	error	unix, daemon, socket, connection, startup-crash
invalid value for Content-Type expected…	validation	error	lsp, json-rpc, protocol, header-validation
formatting embedded JavaScript snippets requires the…	panic	error	rust, cargo-features, formatting, embedded-code, panic
type aliases are not supported in PromiseConstructor	validation	error	codegen, build-time, typescript-libs
A list of attribute is expected	exception	error	rust, proc-macro, compile-time, deserializable, attributes
token kind cannot be transformed to text	panic	error	rust, html, ast, token-factory, panic
empty file	panic	error	css, lsp, format-on-type, panic, empty-file
generated Promise. member has unexpected shape	validation	error	codegen, rust, build, invariant
found a token with no parent	panic	error	css, lsp, format-on-type, panic, defensive-check
bogus members are not supported in	validation	error	codegen, parser, build-time, fixture
Unexpected attribute inside deprecated()	exception	error	rust, proc-macro, compile-time, deserializable, attributes
does not contain Unicode version	validation	error	codegen, unicode, version-mismatch, cache
@biomejs/runtime/plugin is intended to be used in Biome JS…	exception	error	javascript, imports, wrong-package, biome
Promise global must include declare var Promise	validation	error	rust, codegen, typescript, globals, build-time
generated helper has unexpected shape	validation	error	codegen, rust, build, invariant
metavariables are not supported in	validation	error	codegen, metavariable, build-time, fixture
must return Promise	validation	error	rust, codegen, typescript, globals
declare var Promise is missing a type annotation	validation	error	rust, codegen, typescript, build-time, globals
Promise constructor must have one required executor…	validation	error	rust, codegen, typescript, globals
must be a method	validation	error	codegen, build-time, member-shape
Promise constructor executor must be a function type	validation	error	rust, codegen, typescript, globals
value-side PromiseConstructor declarations are not supported	validation	error	codegen, build-time, declaration-merging
getter signatures are not supported in the Error global	validation	error	codegen, build, typescript
setter signatures are not supported in ErrorConstructor	validation	error	codegen, build, typescript
Only one attribute expected inside deprecated()	exception	error	rust, proc-macro, compile-time, deserializable, attributes
Promise is missing	validation	error	codegen, build-time, api-surface
getter signatures are not supported in	validation	error	codegen, typescript, build-time, fixture
Promise constructor executor must return void	validation	error	rust, codegen, typescript, globals
PromiseConstructor extends clauses are not supported	validation	error	codegen, build-time, interfaces
PromiseConstructor must include an interface declaration	validation	error	codegen, build-time, declaration-merging
must not be optional	validation	error	codegen, build-time, optionality
bogus members are not supported in the Error global	validation	error	codegen, parser, build-time, fixture
Promise global must have a value-side declaration	validation	error	codegen, rust, build, typescript-globals
must return Promise with one type argument	validation	error	rust, codegen, typescript, generics, globals
Promise global must have a type-side declaration	validation	error	codegen, rust, build, typescript-globals
PromiseConstructor must have a type-side declaration	validation	error	codegen, rust, build, typescript-globals
Promise global value side references missing…	validation	error	codegen, rust, build, typescript-globals
Promise constructor executor must not be generic	validation	error	rust, codegen, typescript, generics, globals
PromiseConstructor is missing a construct signature	validation	error	codegen, build-time, construct-signature
Promise global must include an interface declaration	validation	error	codegen, rust, build, typescript-globals
metavariables are not supported in ErrorConstructor	validation	error	codegen, build, typescript
type aliases are not supported in the Promise global	validation	error	codegen, rust, build, typescript-globals
unsupported value-side Promise declaration	validation	error	codegen, rust, build, typescript-globals
Promise interface extends clauses are not supported	validation	error	codegen, build-time, interfaces
PromiseConstructor type parameters are not supported	validation	error	codegen, build-time, generics
Tried to format a `format_once` at least twice. This is not…	panic	error
cannot acquire write access to file in read-only filesystem	exception	error
Expected enclosing nodes to at least contain the root node.	panic	error
path does not exists in memory filesystem	exception	error
path already exists in memory filesystem	exception	error
failed to initialize the global thread pool	panic	error
Failed to start the logger for the daemon.	panic	error
this file wasn't open with write access	exception	error
Absolute path must be correctly parsed	panic	error
Scanning task to complete successfully	panic	error
this file wasn't open with read access	exception	error
Expected root for comments with data	panic	error
memory FS doesn't support symlinks	exception	error
failed to get text of map value	panic	error
failed to spawn console thread	panic	error
failed to spawn scanner thread	panic	error
file path should have a parent	panic	error
Input to be smaller than 4 GB	panic	error
To have a valid UTF-8 path	panic	error
Failed to create log file	panic	error
To to have a UTF-8 path	panic	error
valid format document	panic	error
To have a UTF-8 path	panic	error
To be a UTF-8 path	panic	error
integer overflow	panic	error
watcher created	panic	error
overflow error	exception	error