test: set segwit height back to 0 on regtest

mzumsande · jonatack · commit b1646f1bb573 · 2022-03-13T17:43:36.000+01:00
This was changed in #22818 from 0 to 1. Since it changes BLOCK_OPT_WIT of the genesis block, older versions of bitcoin core would not read regtest directories created with newer versions without a reindex. Github-Pull: bitcoin#24527 Rebased-From: 5ce3057
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
@@ -397,7 +397,7 @@ class CRegTestParams : public CChainParams {
         consensus.BIP65Height = 1;  // Always active unless overridden
         consensus.BIP66Height = 1;  // Always active unless overridden
         consensus.CSVHeight = 1;    // Always active unless overridden
-        consensus.SegwitHeight = 1; // Always active unless overridden
+        consensus.SegwitHeight = 0; // Always active unless overridden
         consensus.MinBIP9WarningHeight = 0;
         consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
         consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
