Alexander Astakhov created GROOVY-8478:

             Summary: JsonSlurper in 2.4 loses precision of big integers 
truncating them to longs 
                 Key: GROOVY-8478
             Project: Groovy
          Issue Type: Bug
          Components: JSON
    Affects Versions: 2.4.13
            Reporter: Alexander Astakhov

Consider the following json string:


When parsed by a JsonSlurper x value is trimmed to a -6627335401602580616 as a 
result of the Long overflow.

The reason for this is the following code in the starting from 
line 660:


{{final int length = index - from;}}

{{if (!foundDot && simple) {}}
{{  if (isInteger(buffer, from, length)) {}}
{{    value = parseIntFromTo(buffer, from, index);}}
{{  } else {}}
{{    value = parseLongFromTo(buffer, from, index);}}
{{  }}}
{{} else {}}
{{  value = parseBigDecimal(buffer, from, length);}}

Basically all the numbers besides ones in the scientific notation or containing 
dots are treated as long at best.

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