Why this transaction is valid?

Why this transaction is valid?

The before transaction is @ https://www.blocktrail.com/tBTC/tx/da58f6688b0727a7f1bf3eec899099bde1f18b9c7099f9d2c79556db238e623d

Its output script is "OP_HASH160 da1745e9b549bd0bfa1a569971c77eba30cd5a4b OP_EQUAL".

The current transaction is @ https://www.blocktrail.com/tBTC/tx/839b903b9f79c3372792ceb95917047c46d1b919ed1f6471f5a19d7c865ab32c?txinIdx=0

Its input script is "51".

I verified the transaction manually but it failed. Why the transaction was accepted and confirmed?

The evolved stack is as below. What's wrong? 628850cb844fe63c308c62afc8bc5351f1952a7f = RIPEMD160(SHA256(1)) enter image description here

https://ift.tt/2HwpjIM

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