Errors while using local variables in "block direction" snippets

I got compilation errors while using "block direction" snippet with a local number variable in "y":

   
Executing gradle task: build
Build info: MCreator 2019.5.51710, 1.12.2, 64-bit, 16334 MB, Windows 7, JVM 1.8.0_222, JAVA_HOME: C:\Program Files\Pylo\MCreator2\jdk
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava NO-SOURCE
:processApiResources NO-SOURCE
:apiClasses UP-TO-DATE
:sourceMainJava
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:59: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:85: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:111: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:137: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:172: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:198: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:224: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:250: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
8 errors
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 10s
5 actionable tasks: 4 executed, 1 up-to-date
BUILD FAILED
Task completed in 15982 milliseconds
   
Executing gradle task: build
Build info: MCreator 2019.5.51710, 1.12.2, 64-bit, 16334 MB, Windows 7, JVM 1.8.0_222, JAVA_HOME: C:\Program Files\Pylo\MCreator2\jdk
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava NO-SOURCE
:processApiResources NO-SOURCE
:apiClasses UP-TO-DATE
:sourceMainJava UP-TO-DATE
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:59: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:85: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:111: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:137: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:172: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:198: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:224: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
C:\Users\Dary\UN-1\build\sources\main\java\net\mcreator\untouched_nature\MCreatorUNcurtainsUpOnBlockRightClicked.java:250: error: local variables referenced from an inner class must be final or effectively final 
      
                  IBlockState _bs = world.getBlockState(new BlockPos((int) x, (int) ((y - (i)) + 1), (int) z));
                                                                                           ^
8 errors
:compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 6s
5 actionable tasks: 3 executed, 2 up-to-date
BUILD FAILED
Task completed in 9612 milliseconds

I upload screenshots of a procedure look.

Below the screen are the same parts for other blocks in "else if" fields.