[GROOVY-4489] Generics compilation error occurs when using less then (<) operator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.4, 1.7.5, 2.4.3, 2.5.2
• Fix Version/s: 3.0.4
• Component/s: Compiler
• Assignee: Unassigned
• Reporter: asandor
• Created: 25/Oct/10 03:00
• Updated: 02/May/21 09:22
• Resolved: 02/Mar/21 21:43

Description

The following code is throwing a compilation error (the strange code is a DSL):

def FloatComparison() {
    when:
    o.PROPerty1 < o.PROPerty2
    
    then:
    result = true
}

Missing closing bracket '>' for generics types;
   solution: Please specify the missing bracket! at line: 5, column: 5

Here are some snippets that don't produce this error:

def FloatComparison() {
    when:
    o.pROPerty1 < o.PROPerty2 //the first letter of the first variable is lowercase
    
    then:
    result = true
}

def FloatComparison() {
    when:
    o.PROPerty1 < o.PROPerty2
    
//the label is removed and .x is added after result (without .x the exception occurs)
    result.x = true
}

Looking at the samples that work, this whole mess doesn't make any sense. It seems like a minor but very annoying bug in the compiler. We are working on a DSL, so we can't influence the names of the properties or anything significant that would be a proper workaround.

(This is technically not a JUnit test case, but I think it's enough because it can be simply copied into the Groovy console and run)