Program: 156415
Project: 156415
Buggy source:
@Override public boolean isTriggerActive(TileEntity tile,EnumFacing side,IStatementContainer statementContainer,IStatementParameter[] parameters){
  IFluidHandler handler=tile.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY,side.getOpposite());
  if (handler != null) {
    FluidStack searchedFluid=null;
    if (parameters != null && parameters.length >= 1 && parameters[0] != null && parameters[0].getItemStack() != null) {
      searchedFluid=FluidContainerRegistry.getFluidForFilledItem(parameters[0].getItemStack());
    }
    if (searchedFluid != null) {
      searchedFluid.amount=1;
    }
    FluidTankInfo[] liquids=handler.getTankInfo(side);
    if (liquids == null || liquids.length == 0) {
      return false;
    }
switch (state) {
case Empty:
      for (      FluidTankInfo c : liquids) {
        if (c != null && c.fluid != null && c.fluid.amount > 0 && (searchedFluid == null || searchedFluid.isFluidEqual(c.fluid))) {
          return false;
        }
      }
    return true;
case Contains:
  for (  FluidTankInfo c : liquids) {
    if (c != null && c.fluid != null && c.fluid.amount > 0 && (searchedFluid == null || searchedFluid.isFluidEqual(c.fluid))) {
      return true;
    }
  }
return false;
case Space:
if (searchedFluid == null) {
for (FluidTankInfo c : liquids) {
  if (c != null && (c.fluid == null || c.fluid.amount < c.capacity)) {
    return true;
  }
}
return false;
}
return handler.fill(side,searchedFluid,false) > 0;
case Full:
if (searchedFluid == null) {
for (FluidTankInfo c : liquids) {
if (c != null && (c.fluid == null || c.fluid.amount < c.capacity)) {
return false;
}
}
return true;
}
return handler.fill(side,searchedFluid,false) <= 0;
}
}
return false;
}

Fixed version (ground truth):
@Override public boolean isTriggerActive(TileEntity tile,EnumFacing side,IStatementContainer statementContainer,IStatementParameter[] parameters){
  IFluidHandler handler=tile.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY,side.getOpposite());
  if (handler != null) {
    FluidStack searchedFluid=null;
    if (parameters != null && parameters.length >= 1 && parameters[0] != null && parameters[0].getItemStack() != null) {
      searchedFluid=FluidUtil.getFluidContained(parameters[0].getItemStack());
    }
    if (searchedFluid != null) {
      searchedFluid.amount=1;
    }
    IFluidTankProperties[] liquids=handler.getTankProperties();
    if (liquids == null || liquids.length == 0) {
      return false;
    }
switch (state) {
case Empty:
      FluidStack drained=handler.drain(1,false);
    return drained == null || drained.amount <= 0;
case Contains:
  for (  IFluidTankProperties c : liquids) {
    if (c == null)     continue;
    FluidStack fluid=c.getContents();
    if (fluid != null && fluid.amount > 0 && (searchedFluid == null || searchedFluid.isFluidEqual(fluid))) {
      return true;
    }
  }
return false;
case Space:
if (searchedFluid == null) {
for (IFluidTankProperties c : liquids) {
  if (c == null)   continue;
  FluidStack fluid=c.getContents();
  if ((fluid == null || fluid.amount < c.getCapacity())) {
    return true;
  }
}
return false;
}
return handler.fill(searchedFluid,false) > 0;
case Full:
if (searchedFluid == null) {
for (IFluidTankProperties c : liquids) {
if (c == null) continue;
FluidStack fluid=c.getContents();
if ((fluid == null || fluid.amount < c.getCapacity())) {
return false;
}
}
return true;
}
return handler.fill(searchedFluid,false) <= 0;
}
}
return false;
}