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bug(semantic): AstNode
has incorrect ScopeId
#4436
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4 tasks
Excellent bug-hunting! I suspect this may have been caused by #4347 (but that's just a guess). |
The reference doesn't store The following scope snapshot was generated by your provided playground's code ---
source: crates/oxc_semantic/tests/main.rs
assertion_line: 112
input_file: crates/oxc_semantic/tests/fixtures/oxc/index.ts
---
[
{
"children": [
{
"children": [
{
"children": [
{
"children": [],
"flag": "ScopeFlags(StrictMode | Function)",
"id": 3,
"node": "Function(something)",
"symbols": [
{
"flag": "SymbolFlags(FunctionScopedVariable)",
"id": 3,
"name": "a",
"node": "FormalParameter",
"references": [
{
"flag": "ReferenceFlag(Read)",
"id": 0,
"name": "a",
"node_id": 27
}
]
}
]
}
],
"flag": "ScopeFlags(StrictMode | Function)",
"id": 2,
"node": "Function(<anonymous>)",
"symbols": [
{
"flag": "SymbolFlags(FunctionScopedVariable)",
"id": 2,
"name": "something",
"node": "Function(something)",
"references": [
{
"flag": "ReferenceFlag(Read)",
"id": 0,
"name": "something",
"node_id": 32
}
]
}
]
}
],
"flag": "ScopeFlags(StrictMode | Function)",
"id": 1,
"node": "Function(foo)",
"symbols": [
{
"flag": "SymbolFlags(FunctionScopedVariable)",
"id": 1,
"name": "cb",
"node": "FormalParameter",
"references": [
{
"flag": "ReferenceFlag(Write)",
"id": 0,
"name": "cb",
"node_id": 11
},
{
"flag": "ReferenceFlag(Read)",
"id": 1,
"name": "cb",
"node_id": 28
}
]
}
]
}
],
"flag": "ScopeFlags(StrictMode | Top)",
"id": 0,
"node": "Program",
"symbols": [
{
"flag": "SymbolFlags(BlockScopedVariable | Function)",
"id": 0,
"name": "foo",
"node": "Function(foo)",
"references": [
{
"flag": "ReferenceFlag(Read)",
"id": 0,
"name": "foo",
"node_id": 36
}
]
}
]
}
]
|
11 tasks
Dunqing
pushed a commit
that referenced
this issue
Jul 31, 2024
> Re-creation of #4427 due to rebasing issues. Original attempt: #642 ----- Third time's the charm? Each time I attempt this rule, I find a bunch of bugs in `Semantic`, and I expect this attempt to be no different. Expect sidecar issues+PRs stemming from this PR here. ## Not Supported These are cases supported in the original eslint rule, but that I'm intentionally deciding not to support - export comments in scripts ```js /* exported a */ var a; ``` - global comments ```js /* global a */ var a; ``` ## Behavior Changes These are intentional deviations from the original rule's behavior: - logical re-assignments are not considered usages ```js // passes in eslint/no-unused-vars, fails in this implementation let a = 0; a ||= 1; let b = 0; b &&= 2; let c = undefined; c ??= [] ``` ## Known Limitations - Lint rules do not have babel or tsconfig information, meaning we can't determine if `React` imports are being used or not. The relevant tsconfig settings here are `jsx`, `jsxPragma`, and `jsxFragmentName`. To accommodate this, all imports to symbols named `React` or `h` are ignored in JSX files. - References to symbols used in JSDoc `{@link}` tags are not created, so symbols that are only used in doc comments will be reported as unused. See: #4443 - `.vue` files are skipped completely, since variables can be used in templates in ways we cannot detect > note: `.d.ts` files are skipped as well. ## Todo - [x] Skip unused TS enum members on used enums - [x] Skip unused parameters followed by used variables in object/array spreads - [x] Re-assignments to array/object spreads do not respect `destructuredArrayIgnorePattern` (related to: #4435) - [x] #4493 - [x] References inside a nested scope are not considered usages (#4447) - [x] Port over typescript-eslint test cases _(wip, they've been copied and I'm slowly enabling them)_ - [x] Handle constructor properties ```ts class Foo { constructor(public a) {} // `a` should be allowed } ``` - [x] Read references in sequence expressions (that are not in the last position) should not count as a usage ```js let a = 0; let b = (a++, 0); console.log(b) ``` > Honestly, is anyone even writing code like this? - [x] function overload signatures should not be reported - [x] Named functions returned from other functions get incorrectly reported as unused (found by @camc314) ```js function foo() { return function bar() { } } Foo()() ``` - [x] false positive for TS modules within ambient modules ```ts declare global { // incorrectly marked as unused namespace jest { } } ``` ## Blockers - #4436 - #4437 - #4446 - #4447 - #4494 - #4495 ## Non-Blocking Issues - #4443 - #4475 (prevents checks on exported symbols from namespaces)
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playground link
To reproduce:
cb
(it has a node whose Id is for the aboveCallExpression
)ScopeId
pointed to by that Referencesomething
, when it should be thesomething
functionThe text was updated successfully, but these errors were encountered: