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R error crashes RM

tennenrishintennenrishin Member Posts: 177 Contributor II
edited November 2019 in Help
In R, 
grep('\d','1')
results in
Error: '\d' is an unrecognized escape in character string starting "\d"
(because it should have been '\\d')

But in RM 
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.008">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.008" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="r:execute_script_r" compatibility="5.3.000" expanded="true" height="60" name="pushChart" width="90" x="313" y="75">
        <parameter key="script" value="grep('\d','1')"/>
        <enumeration key="inputs"/>
        <list key="results"/>
      </operator>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>
causes an abrupt termination of RM, without any prompts or messages.
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Answers

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    Nils_WoehlerNils_Woehler Member Posts: 463 Maven
    Hi,

    I've had a look into this and it seems like we can't do anything about it The library we are using creates a JRI session to R.
    When providing the command you've posted this session even crashes the Java Runtime Environment: 

    #
    # A fatal error has been detected by the Java Runtime Environment:
    #
    #  Internal Error (os_windows_x86.cpp:149), pid=10952, tid=10904
    #  guarantee(result == EXCEPTION_CONTINUE_EXECUTION) failed: Unexpected result from topLevelExceptionFilter
    #
    # JRE version: 7.0_07-b11
    # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.3-b01 mixed mode windows-amd64 compressed oops)
    # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
    #
    # An error report file with more information is saved as:
    # C:\Users\nwoehler\workspace\RapidMiner\hs_err_pid10952.log
    #
    # If you would like to submit a bug report, please visit:
    #   http://bugreport.sun.com/bugreport/crash.jsp
    # The crash happened outside the Java Virtual Machine in native code.
    # See problematic frame for where to report the bug.
    #
    I'm going to file an issue for this, but probably there is no easy fix for this.

    Best,
    Nils
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