[GROOVY-10792] Declared generic parameter on method not transferred to Closure

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.6
• Fix Version/s: 5.0.0-alpha-1
• Component/s: Compiler
• Assignee: Eric Milles
• Reporter: Christopher Smith
• Created: 21/Oct/22 19:42
• Updated: 30/May/23 17:48
• Resolved: 30/May/23 17:19

Description

This is probably a duplicate, but I'm not sure which of.

I'm using Awaitility's until(Callable<Boolean>) and passing it a closure:

List<String> buffer = []
...
await().until { buffer }

Expected behavior: buffer is coerced to a boolean using Groovy truth.

Actual behavior:

java.lang.ClassCastException: class java.util.ArrayList cannot be cast to class java.lang.Boolean

Issue Links

• is related to: GROOVY-8168 When using Interface: BigDecimal cannot be cast to Double
• is related to: GROOVY-9971 @TypeChecked: Closure<String> no longer compatible with Closure<GString> argument
• relates to: GROOVY-11051 Static compiler does not coerce Groovy truth from closures