Weird bug with numbers or char or i don't know

[tserber98]

$rem = 10;

var_dump(chr(ord('A') + ($rem - 10)));

Log

jppm start
-> win
-> app:run
-> install
java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    $php_module_m077e3488bd374227a16264e32ed01e2b.__include(Lphp/runtime/env/Environment;[Lphp/runtime/Memory;Lphp/runtime/memory/ArrayMemory;)Lphp/runtime/Memory; @43: invokevirtual
  Reason:
    Type long_2nd (current frame, stack[3]) is not assignable to integer
  Current Frame:
    bci: @43
    flags: { }
    locals: { 'php/runtime/env/Environment', '[Lphp/runtime/Memory;', 'php/runtime/memory/ArrayMemory', 'php/runtime/memory/ArrayMemory', '[Lphp/runtime/env/TraceInfo;', 'php/runtime/Memory' }
    stack: { 'php/runtime/env/Environment', 'php/runtime/Memory', long, long_2nd }
  Bytecode:
    0x0000000: 2cb8 002d 4eb2 002f 3a04 2d59 1231 b600
    0x0000010: 373a 0557 1905 b200 3903 32b6 003d 572a
    0x0000020: 1905 1400 3eb6 0043 1400 44b6 0049 b600
    0x0000030: 4d88 b800 53b8 0058 01b8 005e 57b2 0061
    0x0000040: b0

        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
        at java.lang.Class.getDeclaredMethod(Class.java:2128)
        at php.runtime.loader.RuntimeClassLoader.loadModule(RuntimeClassLoader.java:139)
        at php.runtime.env.CompileScope.loadModule(CompileScope.java:618)
        at php.runtime.env.CompileScope.loadModule(CompileScope.java:622)
        at php.runtime.env.Environment.importModule(Environment.java:1253)
        at php.runtime.env.ConcurrentEnvironment.importModule(ConcurrentEnvironment.java:175)
        at php.runtime.env.ModuleManager.fetchTemporaryModule(ModuleManager.java:71)
        at php.runtime.env.ModuleManager.fetchModule(ModuleManager.java:41)
        at php.runtime.env.ModuleManager.fetchModule(ModuleManager.java:27)
        at php.runtime.launcher.Launcher.loadFrom(Launcher.java:121)
        at php.runtime.launcher.Launcher.run(Launcher.java:309)
        at php.runtime.launcher.Launcher.run(Launcher.java:248)
        at php.runtime.launcher.Launcher.run(Launcher.java:244)
        at php.runtime.launcher.Launcher.main(Launcher.java:426)