Merge #12582: Fix ListCoins test failure due to unset g_wallet_allow_fallback_fee

7ba2d57 Fix ListCoins test failure due to unset g_wallet_allow_fallback_fee (Russell Yanofsky)

Pull request description:

  New global variable was introduced in #11882 and not setting it causes:

  ```
  wallet/test/wallet_tests.cpp(638): error in "ListCoins": check wallet->CreateTransaction({recipient}, wtx, reservekey, fee, changePos, error, dummy) failed
  wallet/test/wallet_tests.cpp(679): error in "ListCoins": check list.begin()->second.size() == 2 failed [1 != 2]
  wallet/test/wallet_tests.cpp(686): error in "ListCoins": check available.size() == 2 failed [1 != 2]
  wallet/test/wallet_tests.cpp(705): error in "ListCoins": check list.begin()->second.size() == 2 failed [1 != 2]
  ```

  It's possible to reproduce the failure reliably by running:

  ```
  src/test/test_bitcoin --log_level=test_suite --run_test=wallet_tests/ListCoins
  ```
  Failures happen nondeterministically because boost test framework doesn't run tests in a specified order, and tests that run previously can set the global variables and mask the bug.

  This is similar to bugs #12150 and #12424. Example travis failures are:

  https://travis-ci.org/bitcoin/bitcoin/jobs/348296805#L2676
  https://travis-ci.org/bitcoin/bitcoin/jobs/348362560#L2769
  https://travis-ci.org/bitcoin/bitcoin/jobs/348362563#L2824

Tree-SHA512: ca37b554a75c12ac2d534de62bf74eb9e0b29e4399ebf1fa10053a40887e55e9e7135f754a01e5a67499cc8677ae226542146b370b1e83d08bb63d79ff379073

Author: MarcoFalke

src/qt/test/wallettests.cpp

@@ -158,8 +158,6 @@ void TestGUI()
         test.CreateAndProcessBlock({}, GetScriptForRawPubKey(test.coinbaseKey.GetPubKey()));
     }
     bitdb.MakeMock();
-    g_wallet_allow_fallback_fee = true;
-
     std::unique_ptr<CWalletDBWrapper> dbw(new CWalletDBWrapper(&bitdb, "wallet_test.dat"));
     CWallet wallet(std::move(dbw));
     bool firstRun;

src/wallet/test/wallet_test_fixture.cpp

@@ -11,8 +11,6 @@ WalletTestingSetup::WalletTestingSetup(const std::string& chainName):
     TestingSetup(chainName)
 {
     bitdb.MakeMock();
-    g_wallet_allow_fallback_fee = true;
-
     bool fFirstRun;
     g_address_type = OUTPUT_TYPE_DEFAULT;
     g_change_type = OUTPUT_TYPE_DEFAULT;

src/wallet/wallet.cpp

@@ -43,7 +43,7 @@ bool bSpendZeroConfChange = DEFAULT_SPEND_ZEROCONF_CHANGE;
 bool fWalletRbf = DEFAULT_WALLET_RBF;
 OutputType g_address_type = OUTPUT_TYPE_NONE;
 OutputType g_change_type = OUTPUT_TYPE_NONE;
-bool g_wallet_allow_fallback_fee = false; //<! will be defined via chainparams
+bool g_wallet_allow_fallback_fee = true; //<! will be defined via chainparams
 
 const char * DEFAULT_WALLET_DAT = "wallet.dat";
 const uint32_t BIP32_HARDENED_KEY_LIMIT = 0x80000000;

src/wallet/wallet.h

@@ -66,7 +66,6 @@ static const unsigned int DEFAULT_TX_CONFIRM_TARGET = 6;
 static const bool DEFAULT_WALLET_RBF = false;
 static const bool DEFAULT_WALLETBROADCAST = true;
 static const bool DEFAULT_DISABLE_WALLET = false;
-static const bool DEFAULT_WALLET_ALLOW_FALLBACKFEE = true;
 
 extern const char * DEFAULT_WALLET_DAT;