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Wrong compression #1087

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Description

@MineYuanlu

Bug report or Feature request?
Bug report

Version (complete output of terser -V or specific git commit)
8.0.0
Complete CLI command or minify() options used
I don't know

terser input

window.someGlobalData = {
    oneFunc: function() { console.log(JSON.stringify(this.data)); }
};
(() => {
    let data = { d: 1 };
    data = ({ f: window.someGlobalData.oneFunc, data: data }).f();
})();

terser output or error

window.someGlobalData={oneFunc:function(){console.log(JSON.stringify(this.data))}},(()=>{let o={d:1};o=window.someGlobalData.oneFunc()})();

format:

window.someGlobalData = { oneFunc: function() { console.log(JSON.stringify(this.data)) } }, (() => {
    let o = { d: 1 };
    o = window.someGlobalData.oneFunc()
})();

Expected result

window.someGlobalData = { oneFunc: function() { console.log(JSON.stringify(this.data)) } }, (() => {
    let o = { d: 1 };
    o = ({f:window.someGlobalData.oneFunc(),data:o}).f();
})();

window.someGlobalData.oneFunc uses the this.data variable, but the this.data environment is removed by mistake after compression

webpack issue:webpack/webpack#14455

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