fix testsnippet crash
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@ -73,6 +73,7 @@ coll.push("cow")
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<br/>
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<br/>
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```blocks
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```blocks
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let coll: string[] = []
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let index = Math.random(coll.length)
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let index = Math.random(coll.length)
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let word = coll[index]
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let word = coll[index]
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```
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```
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