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fix io undo logic error (#4027)
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1 changed files with 1 additions and 1 deletions
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@ -117,7 +117,7 @@ class UndoStack {
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private push(): void {
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const entry = JSON.stringify(this.canvas?.toJSON(["id"]));
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if (entry === this.stack[this.stack.length - 1]) {
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if (entry === this.stack[this.index]) {
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return;
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}
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this.stack.length = this.index + 1;
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