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fix(minifier): do not remove undefined for destructuring patterns (#6828)

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This commit is contained in:
Boshen 2024-10-23 15:42:04 +00:00
parent 5928f043b5
commit 22355f73f3
2 changed files with 7 additions and 14 deletions
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7
crates/oxc_minifier/src/ast_passes/peephole_substitute_alternate_syntax.rs
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@ -298,7 +298,8 @@ impl<'a, 'b> PeepholeSubstituteAlternateSyntax {
decl: &mut VariableDeclarator<'a>,
ctx: Ctx<'a, 'b>,
) {
if decl.kind.is_const() {
// Destructuring Pattern has error throwing side effect.
if decl.kind.is_const() || decl.id.kind.is_destructuring_pattern() {
return;
}
if decl.init.as_ref().is_some_and(|init| ctx.is_expression_undefined(init)) {
@ -592,6 +593,10 @@ mod test {
// shadowd
test_same("(function(undefined) { let x = typeof undefined; })()");
// destructuring throw error side effect
test_same("var {} = void 0");
test_same("var [] = void 0");
}
#[test]

14
tasks/coverage/snapshots/runtime.snap
View file

@ -2,7 +2,7 @@ commit: 06454619
runtime Summary:
AST Parsed : 18444/18444 (100.00%)
Positive Passed: 18194/18444 (98.64%)
Positive Passed: 18198/18444 (98.67%)
tasks/coverage/test262/test/annexB/language/function-code/if-decl-else-decl-a-func-existing-block-fn-no-init.js
minify error: Test262Error: Expected SameValue(«function f(){}», «undefined») to be true
@ -735,21 +735,9 @@ codegen error: Test262Error: Expected SameValue(«"B"», «"A"») to be true
tasks/coverage/test262/test/language/statements/async-generator/return-undefined-implicit-and-explicit.js
minify error: Test262Error: Actual [tick 1, g1 ret, g2 ret, g3 ret, g4 ret, tick 2] and expected [tick 1, g1 ret, g2 ret, tick 2, g3 ret, g4 ret] should have the same contents. Ticks for implicit and explicit return undefined
tasks/coverage/test262/test/language/statements/for/dstr/let-obj-init-undefined.js
minify error: SyntaxError: Missing initializer in destructuring declaration
tasks/coverage/test262/test/language/statements/for/dstr/var-obj-init-undefined.js
minify error: SyntaxError: Missing initializer in destructuring declaration
tasks/coverage/test262/test/language/statements/for-of/string-astral-truncated.js
codegen error: Test262Error: Expected SameValue(«"\\"», «"\\ud801"») to be true
tasks/coverage/test262/test/language/statements/let/dstr/obj-init-undefined.js
minify error: SyntaxError: Missing initializer in destructuring declaration
tasks/coverage/test262/test/language/statements/variable/dstr/obj-init-undefined.js
minify error: SyntaxError: Missing initializer in destructuring declaration
tasks/coverage/test262/test/language/statements/with/has-binding-call-with-proxy-env.js
minify error: Test262Error: Actual [] and expected [has:Object] should have the same contents.