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swc minify bug #10178

@littleprincewdk

Description

@littleprincewdk

Describe the bug

swc does not recognize the change in the array in some situation.

Input code

var c = 'push'; // maybe any word for (var a = 1, b = []; a < 5; a++) { b[c]({}); } b[0][d] = 1; b[e][f] = b[1][g];

Config

{ "jsc": { "parser": { "syntax": "ecmascript", "jsx": true }, "target": "es5", "loose": false, "minify": { "compress": { }, "mangle": false }, "externalHelpers": false }, "module": { "type": "es6" }, "minify": true, "isModule": true }

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.11.8&code=H4sIAAAAAAAAAxWLsQqDQBAF%2B%2F2K16koqEWqjV%2BybHF7p6ZJDCcaRPz3rNUwMLOHjIgBxXdbXwWjbfEOh40InwO%2FJSeiackod%2B%2BCd30Dc4iy6xMPR11XOAkwiVqeV8V0EZl0Kknvg11GlekWk15lVv4D3BuDjHcAAAA%3D&config=H4sIAAAAAAAAA1WPPQ7DMAiF957CYu7aDj1Blx4CuaRy5D8BkRJFuXsdx0nTDT7e48F8MQZ6sfAwcylLk5GF%2BOgLkSkqjoUA2YBi2WWF6z7tZR0pD1TJsg1AkT%2Bk1SS3pgafklBhHXqhxoKLrpvOeTaFzCRyYsa0YjlyA8aPP5b9ZdOoxBH9k3wmlpOmKiCk91Ct7WWdMm2X3uEn2u9aX6vEyWs31neXL%2B8BHY89AQAA

SWC Info output

No response

Expected behavior

terser is ok:

Image

Actual behavior

swc does not recognize the change in the array:

Image

Version

1.11.8

Additional context

No response

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