Cannot capture locals for class initializers

[ChloeDawn]

Mixin fails to locate method metadata for class initializers when an injection requests locals capture. The failure occurs at the following point in Locals:

Mixin/src/main/java/org/spongepowered/asm/util/Locals.java

Lines 139 to 142 in 804bd2c

	Method methodInfo = classInfo.findMethod(method);
	if (methodInfo == null) {
	throw new LVTGeneratorException("Could not locate method metadata for " + method.name + " generating LVT in " + classNode.name);
	}

A simple reproduction case for net.minecraft.block.Blocks:

@Mixin(Blocks.class)
abstract class BlocksMixin {
  private BlocksMixin() {
    throw new AssertionError();
  }

  @Inject(method = "<clinit>", at = @At(value = "INVOKE", target = "Lnet/minecraft/block/BlockState;initShapeCache()V"), locals = LocalCapture.CAPTURE_FAILHARD)
  private static void testInjection(final CallbackInfo ci, final Block block, final BlockState state) {}
}

Targetting a loop at the tail of the class initializer, as seen in source:

for(Block block_1 : Registry.BLOCK) {
  for(BlockState blockState_1 : block_1.getStateFactory().getStates()) {
    blockState_1.initShapeCache();
    Block.STATE_IDS.add(blockState_1);
  }

  block_1.getDropTableId();
}

Failing with:

org.spongepowered.asm.util.throwables.LVTGeneratorException: Could not locate method metadata for <clinit> generating LVT in net/minecraft/block/Blocks