fix: multiple bugfixes

- Fix data race: use atomic.Bool for running in server.go
- Fix busy loop in timer.go: use time.After when idle
- Fix division by zero in print_replay
- Fix silently swallowed errors in proto_generator
- Fix suppressed error in native_encoder
- Delete unused registry_data_hunter

mc/proto_generator/helper_generator.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"go/ast"
 	"os"
 	"strconv"
@@ -38,8 +39,14 @@ func GeneratePacketInfoFile(versions []string, packetInfos []PacketInfo) (err er
 			typeExpr = Selector(vUnderscore, typeName)
 		}
 
-		packetId, _ := strconv.ParseInt(p.PacketId, 0, 32)
-		protocolVersion, _ := strconv.Atoi(p.ProtocolVersion)
+		packetId, err := strconv.ParseInt(p.PacketId, 0, 32)
+		if err != nil {
+			panic(fmt.Errorf("failed to parse packet ID %q: %w", p.PacketId, err))
+		}
+		protocolVersion, err := strconv.Atoi(p.ProtocolVersion)
+		if err != nil {
+			panic(fmt.Errorf("failed to parse protocol version %q: %w", p.ProtocolVersion, err))
+		}
 
 		packetInfoExprs = append(packetInfoExprs, CompLit(nil, []ast.Expr{
 			KeyValueExpr(Ident("Type"), AddrOf(CompLit(typeExpr, nil))),

mc/proto_generator/native_encoder.go

@@ -87,6 +87,7 @@ func ArrayEncoder(g *Generator, varToSet ast.Expr, dataRaw any, name string) (s
 	}
 	s2, err := g.VisitEncoder(Index(varToSet, Ident(iName)), data.Type, name+"Inner")
 	if err != nil {
+		return
 	}
 	s2 = Stmts(ForRange(Ident(iName), Call(Ident("len"), varToSet), NewBlock(s2)))
 	s = append(s1, s2...)