runner: endow test accounts on genesis

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/differential/genesis.json

@@ -26,5 +26,15 @@
     "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
     "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
     "timestamp": "0x00",
-    "alloc": {}
+    "alloc": {
+        "0101010101010101010101010101010101010101": {
+            "balance": "1000000000"
+        },
+        "0202020202020202020202020202020202020202": {
+            "balance": "1000000000"
+        },
+        "0303030303030303030303030303030303030303": {
+            "balance": "1000000000"
+        }
+    }
 }

crates/differential/src/lib.rs

@@ -100,10 +100,9 @@ pub struct EvmOutput {
 impl EvmOutput {
     /// Return if there was no error found.
     ///
-    /// Panics if the gas used is zero as this indicates nothing was run, i.e.
-    /// there was no receiving account but still no error is reported.
+    /// Panics if the gas used is zero as this indicates nothing was run.
     pub fn run_success(&self) -> bool {
-        assert_ne!(self.gas_used, U256::ZERO, "nothing was executed");
+        assert_ne!(self.gas_used, U256::ZERO, "nothing was executed: {self:?}");
         self.error.is_none()
     }
 }