move-onlyish: move CCoinsViewErrorCatcher out of init.cpp

and into coins.cpp. This move is necessary so that we can later include a
CCoinsViewErrorCatcher instance under CChainState.

Co-authored-by: MarcoFalke <falke.marco@gmail.com>

src/coins.cpp

@@ -5,6 +5,7 @@
 #include <coins.h>
 
 #include <consensus/consensus.h>
+#include <logging.h>
 #include <random.h>
 #include <version.h>
 
@@ -258,3 +259,19 @@ const Coin& AccessByTxid(const CCoinsViewCache& view, const uint256& txid)
     }
     return coinEmpty;
 }
+
+bool CCoinsViewErrorCatcher::GetCoin(const COutPoint &outpoint, Coin &coin) const {
+    try {
+        return CCoinsViewBacked::GetCoin(outpoint, coin);
+    } catch(const std::runtime_error& e) {
+        for (auto f : m_err_callbacks) {
+            f();
+        }
+        LogPrintf("Error reading from database: %s\n", e.what());
+        // Starting the shutdown sequence and returning false to the caller would be
+        // interpreted as 'entry not found' (as opposed to unable to read data), and
+        // could lead to invalid interpretation. Just exit immediately, as we can't
+        // continue anyway, and all writes should be atomic.
+        std::abort();
+    }
+}