ErrLookup › rust-lang/rust-analyzer

rust-lang/rust-analyzer

A Rust compiler front-end for IDEs · Rust · 1,440 source files

Analyzed at e8f7e90aa3 on 2026-09-03. 134 documented errors.

Code / Message	Type	Severity	Tags
proc-macro-srv-cli needs to be compiled with the…	error_code	error
No file available to rename	error_code	error	rust-analyzer, rename, macros, lsp
missing entry for : (field )	panic	error	rust, config, panic, unreachable-match
tried to set QoS of thread which has opted out of QoS	panic	error	rust, macos, thread-priority, qos, panic
unmatched closing delimiter from syntax fixup	panic	error	rust, panic, macros, syntax-fixup, token-tree
AstIdMap node mismatch with node	panic	error	rust, panic, invariant, ast, type-mismatch
error creating directory	error_code	error
you have way too many items in the same file!	panic	error	rust, panic, invariant, internal-limit
Unable to make path absolute	panic	error
Can't find SyntaxNodePtr	panic	error	rust, panic, stale-data, salsa, ast
Unable to deserialize message	panic	error
inconsistent text range	validation	error	rust-analyzer, rename, lsp, ambiguity
Invalid name ` `: cannot rename to a keyword	validation	error	rust-analyzer, rename, keyword, validation
unable to get FileId	panic	error	lsp, uri, panic, indexing, virtual-documents
Failed to parse pattern	validation	error	rust, parsing, lexer, ssr
Failed to make ast node	panic	error	ast, make, panic, syntax
A receiver has been dropped, something panicked!	error_code	critical	panic, channel, lsp-server, rust-analyzer
EnumVariants are always nested in Enums	panic	error	rust, syntax-tree, invariant-assertion, panic
equivalent ancestor node should be present in target tree	panic	error	rust, syntax-tree, internal-invariant, panic
an edit target must still be present	panic	error	rust, syntax-editor, internal-invariant, panic
proc-macro server did not respond with data	error_code	error
We explicitly do not provide canonicalization API, as that…	panic	error	rust, paths, panic, api-removed
tried to get QoS of thread which has opted out of QoS	panic	error	rust, macos, thread-priority, qos, panic
expected ident	validation	error	parser, ungrammar, grammar-syntax
attempted to deserialize value that cannot set `PERSIST` to…	panic	error
diagnostic error detected	exception	error	cli, diagnostics, static-analysis, exit-code
{e:?}: {error}	error_code	error
invalid delimiter	panic	error	ast, syntax-kind, panic, api-misuse
Cannot rename reference to `_` as it is being referenced…	error_code	error	rust, ide, rename, semantics
Next token must be ident	panic	error	rust, panic, macros, parser, token-tree
is not a valid punct	panic	error	proc-macro, token-tree, panic, parser
the nearest mapped ancestor must map its descendants	panic	error	rust, syntax-tree, internal-invariant, panic
received response for unknown request	panic	error	lsp, protocol, panic, request-queue
Invalid LSP resolve data	error_code	warning	lsp, inlay-hints, stale-data, rust-analyzer
Failed to make expr node	panic	error	ast, make, panic, syntax
not implemented	panic	error
Unable to serialize args	panic	error
expected at least one token	panic	error	rust, proc-macro, syntax, parser
Unable to convert to an AbsPath	panic	error	rust-analyzer, filesystem, panic, path
Unable to get AbsPath	panic	error	lsp, uri, panic, workspace-discovery, virtual-documents
not a BlockExpr	panic	error	rust-analyzer, ast, internal-invariant, panic
failed to spawn thread	panic	error	threading, rust, resource-limits
No files to search	error_code	error	rust, ide-ssr, empty-input, structural-search
Cannot rename a non-local definition	error_code	error
Token from lexer must be single char: token =	panic	error	rust, panic, macros, lexer, token-tree
Expected ident, found	validation	error	rust, parsing, ssr, constraints
Project discovery failed	error_code	error	rust, lsp, project-discovery, configuration
attempted to serialize value that set `PERSIST` to false	panic	error
Cannot rename parameter to self for trait functions	validation	error	rust, rename, trait, ide
failed, stderr	exception	error	toolchain, rustup, rustc, process-failure
syntax annotation id overflow	panic	error	rust, overflow, panic, long-running-process, syntax-editor
client exited without proper shutdown sequence	exception	error	lsp, rust-analyzer, shutdown, protocol
we never provide completions for excluded files	panic	error	lsp, completions, panic, file-id
cargo runnable should deserialize	panic	warning	tests, serde, deserialization, lsp-ext
invalid profile longer_than	panic	error	rust-analyzer, tracing, profiling, parsing
No title could be found; this is a bug	panic	error	lsp, workspace-discovery, panic, config-reload, progress
MatchArms are always nested in MatchExprs	panic	error	rust, syntax-tree, invariant-assertion, panic
Cannot rename a tool module	error_code	error
Invalid name ` `: not an identifier	validation	error	rust, ide, rename, identifier-validation
missing default crate root, specify a main.rs or lib.rs	panic	error	rust, testing, fixture, crate-graph, panic
Cannot rename local to self outside of function	validation	error	rust-analyzer, rename, self-parameter, validation
Failed to parse `build.target` as an array of target	error_code	error	config, toml, cargo, rust-analyzer
reachable plan nodes are not discarded	panic	error	rust, internal-invariant, panic, syntax-editor
serialized runnable	panic	warning	tests, serde, serialization, lsp-ext
Can't find ast id in AstIdMap	panic	error	rust, panic, stale-data, salsa, ast
Can't rename local that is defined in a macro declaration	error_code	error	rust, ide, rename, macros
Parameter type differs from impl block type	validation	error	rust, rename, impl, type-mismatch
Unable to serialize data	panic	error	rust-analyzer, tracing, serialization, panic
rename_to_self invoked on destructuring parameter	validation	error	rust-analyzer, rename, self-parameter, pattern
no block	panic	warning	rust-analyzer, tests, fixture, panic
Cannot alias reference to a lifetime identifier	validation	error	rust-analyzer, rename, alias, lifetime
bad tag	panic	error	rust, proc-macro, protocol-decoding, panic
Not a valid Rust expression, type, item, path or pattern	validation	error	rust, ide-ssr, parse-error, invalid-pattern
cargo check failed to start	console	error	rust, cargo, flycheck, lsp, environment
Invalid name ` `: cannot rename to `self	validation	error	rust, ide, rename, keywords
No references found at position	validation	error	rust-analyzer, rename, lsp, not-found
Cannot rename builtin type	error_code	error	rust, ide, rename, lsp
Unexpected token while parsing placeholder	validation	error	rust, parsing, ssr, placeholder-syntax
Expected found	validation	error	rust, parsing, ssr, constraints
`SyntaxContext::as_id()` called on a root `SyntaxContext`	panic	error	rust-analyzer, salsa, hygiene, internal-invariant
`ast::DocComment` must have a comment token	panic	error	rust, syntax, ast, invariant
macro definition has parse errors	error_code	error	rust, macros, parse-error, ide
Could not find file position in fixture. Did you forget to…	panic	error	rust, testing, fixture, panic
{message}	error_code	error	rust, lsp, diagnostics, notification
proc-macro server closed the stream	error_code	error	proc-macro, ipc, eof, rust-analyzer
Invalid name ` `: not a lifetime identifier	validation	error	rust, ide, rename, lifetimes
Unsupported constraint type	validation	error	rust, parsing, ssr, constraints
shell runnable should deserialize	panic	warning	tests, serde, deserialization, lsp-ext
Invalid name ` `: cannot rename module to	validation	error	rust, ide, rename, identifier-validation
Invalid name	validation	error	rust-analyzer, rename, lexer, validation
unexpected token	error_code	error	parser, ungrammar, syntax
Unknown node kind	validation	error	rust, parsing, ssr, constraints
Renaming aliases is currently unsupported	validation	error	rust-analyzer, rename, unsupported, alias
Cannot rename `Self`	error_code	error	rust, ide, rename, self-type
UseTreeLists are always nested in UseTrees	panic	error	rust, syntax, ast, invariant
duplicate rule	validation	error	parser, ungrammar, duplicate-definition
dynamic `SyntaxKind` for `AstNode::kind()`	panic	error	ast, syntax-kind, panic, api-misuse
this node should have an ast id	panic	error	rust-analyzer, ast, internal-invariant, panic
Memory profiling is not enabled for this build of…	error_code	error	rust-analyzer, feature-flag, profiling, build-config
Invariant violation: file emitted multiple times.	panic	critical	rust, cli, scip, index, invariant-violation, panic