[GROOVY-8065] Map created as org.springframework.http.HttpHeaders is empty in 2.4.8, works fine in 2.4.7

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.8
• Fix Version/s: 2.4.9
• Environment: Java 1.8.0_102; OS X 10.10.5
• Assignee: Paul King
• Reporter: Andy Wilkinson
• Created: 25/Jan/17 13:47
• Updated: 07/Jan/22 18:07
• Resolved: 28/Jan/17 05:17

Description

There appears to be a regression in Groovy 2.4.8 that causes it to silently create an empty map when it's asked to create it as an instance of Spring Framework's HttpHeaders.

Here's a minimal reproduction:

@Grab("org.springframework:spring-web:4.3.5.RELEASE")
import org.springframework.http.HttpHeaders

def headers = ['Content-Type'       : 'application.json',
               'Content-Disposition': 'test.zip'] as HttpHeaders

println headers

It works as expected with 2.4.7:

$ sdk use groovy 2.4.7 && groovy asHttpHeaders.groovy

Using groovy version 2.4.7 in this shell.
[Content-Type:[application.json], Content-Disposition:[test.zip]]

With 2.4.8 the map is empty:

$ sdk use groovy 2.4.8 && groovy asHttpHeaders.groovy

Using groovy version 2.4.8 in this shell.
[:]

Issue Links

• is related to: GROOVY-5001 Map access is given higher precedence when trying to access fields/properties in classes which implement java.util.Map or extend java.util.HashMap or java.util.Properties
• is related to: GROOVY-5985 Invalid hash key "serialVersionUID"
• links to: GitHub Pull Request #480