NVIDIA GPUs: SIGABRT crash when entering world (GL_MAX_IMAGE_UNITS = 8, shader binding out of range)

[brainAThome]

Bug Report

Description

Minecraft Bedrock crashes with Signal 6 (SIGABRT) in the "Rendering Pool" thread immediately after entering a world on all NVIDIA desktop GPUs using the proprietary driver.

The main menu renders fine — the crash happens when compute shaders for world rendering are loaded.

Root Cause

Minecraft's GLSL compute shaders declare image2DArray uniforms with binding = 9 (and potentially higher). On NVIDIA desktop GPUs, GL_MAX_IMAGE_UNITS = 8 (units 0–7), so binding index 9 is out of range.

// This line in Minecraft's shader causes the crash:
layout(binding = 9, rgba16f) uniform writeonly image2DArray outputBuffer;

The shader fails to compile, Minecraft doesn't check the compile status, and the game attempts to use the invalid program → std::terminate() → SIGABRT.

Crash Log

Signal 6 in thread "Rendering Pool" at
  [libminecraftpe.so + 0x5dc9898]
  gsignal → abort → __gnu_cxx::__verbose_terminate_handler()
  → __cxxabiv1::__terminate(void (*)()) → std::terminate()

Affected Hardware

Any NVIDIA GPU reporting GL_MAX_IMAGE_UNITS = 8:

• GeForce RTX 4090/4080/4070/4060 (all variants)
• GeForce RTX 3090/3080/3070/3060
• GeForce RTX 2080/2070/2060
• GeForce GTX 1080/1070/1060
• All Quadro/Tesla cards

AMD/Intel GPUs are not affected (they typically report higher values).

Test System

Component	Details
OS	Kubuntu 24.04.4 LTS, Kernel 6.17.0-19-generic
GPU	NVIDIA GeForce RTX 4080, Driver 590.48.01
MC	Bedrock Edition 1.26.0.2 via mcpelauncher (ng branch)

Fix

PR #133 fixes this by intercepting glShaderSource and remapping image binding values ≥ 8 to val % 8. Only image* type declarations are affected — sampler, UBO, and SSBO bindings are left untouched.

Additionally, glBindImageTexture calls are remapped consistently to match the shader changes.

See PR #133 for full implementation details and documentation.