InputBooster

[2.0.3] - 2026-04-04

🐛 Fixed

Critical — "Not Responding" on MC 1.21.11 (Root Cause)

• DebugHudMixin crash on startup: The @Inject in DebugHudMixin targeted the intermediary method name method_1835 (getLeftText), which was remapped in MC 1.21.11. With the default require=1, a failed injection throws InvalidInjectionException, crashing the render thread and leaving a blank white "Not Responding" window. Fixed by adding require=0 so the injection silently skips if the target method is not found in the current MC version.
• defaultRequire: 1 in mixin config: inputbooster.mixins.json had "defaultRequire": 1, making every mixin injection fatal if unresolved. Changed to "defaultRequire": 0 as a global safety net.

Thread Safety — Polling Thread Reading MC State Directly

• Unsafe MC options reads from background thread (critical): InputPollingThread.poll() was calling MinecraftClient.getInstance() and reading mc.options.attackKey.isPressed() and all other key bindings directly from the background polling thread. Minecraft's KeyBinding objects are not thread-safe — concurrent reads from a non-main thread cause lock contention and can deadlock the game. Introduced KeySnapshot, a new immutable class that captures all key states on the main thread once per tick. The polling thread now reads exclusively from this snapshot.
• WTapAssist race condition: pendingWRelease and wReleaseTickDelay were plain boolean/int fields written by the polling thread via onWRelease() and read by the main thread in tick(). Without volatile, the main thread could see stale values. Both fields marked volatile.
• CpsLimiter not thread-safe: clickTimestamps was an ArrayDeque — not safe for concurrent access. Replaced with ConcurrentLinkedDeque.

✨ Added

• KeySnapshot.java — New immutable class capturing all key binding states on the main thread each tick, published as a volatile field on InputBoosterMod for the polling thread to read safely. Eliminates all direct MC object access from the background thread.

🔧 Changed

• InputPollingThread no longer imports or references MinecraftClient or GameOptions.
• InputBoosterMod now updates keySnapshot each tick alongside gameReady and gamePaused.
• DebugHudMixin priority set to 900 and added null guard on cir.getReturnValue().