Merge #12133: [qa] Fix rare failure in p2p-segwit.py

35c2b1f Fix rare failure in p2p-segwit.py (Suhas Daftuar)

Pull request description:

  Avoid creating very small utxos that would violate an assumption in
  test_non_standard_witness.

  Fixes #11953

Tree-SHA512: 5fb7ae68f8731df819bab365923a84568b57227e4112f711fc2574767d15be83acd3e99d0d5bac94a42411a958b13a2119468babefed14efcfdda180004d4166

test/functional/p2p-segwit.py

@@ -1396,18 +1396,20 @@ class SegWitTest(BitcoinTestFramework):
 
         temp_utxos.pop(0)
 
-        # Update self.utxos for later tests. Just spend everything in
-        # temp_utxos to a corresponding entry in self.utxos
+        # Update self.utxos for later tests by creating two outputs
+        # that consolidate all the coins in temp_utxos.
+        output_value = sum(i.nValue for i in temp_utxos) // 2
+
         tx = CTransaction()
         index = 0
-        for i in temp_utxos:
         # Just spend to our usual anyone-can-spend output
-            # Use SIGHASH_SINGLE|SIGHASH_ANYONECANPAY so we can build up
+        tx.vout = [CTxOut(output_value, CScript([OP_TRUE]))] * 2
+        for i in temp_utxos:
+            # Use SIGHASH_ALL|SIGHASH_ANYONECANPAY so we can build up
             # the signatures as we go.
             tx.vin.append(CTxIn(COutPoint(i.sha256, i.n), b""))
-            tx.vout.append(CTxOut(i.nValue, CScript([OP_TRUE])))
             tx.wit.vtxinwit.append(CTxInWitness())
-            sign_P2PK_witness_input(witness_program, tx, index, SIGHASH_SINGLE|SIGHASH_ANYONECANPAY, i.nValue, key)
+            sign_P2PK_witness_input(witness_program, tx, index, SIGHASH_ALL|SIGHASH_ANYONECANPAY, i.nValue, key)
             index += 1
         block = self.build_next_block()
         self.update_witness_block_with_transactions(block, [tx])