redhat-developer / redhat-developer/vscode-java
"No suggestions" for autocompletion inside a lambda
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Description
Sometimes autocompletion is unable to provide suggestions inside a lambda
Environment
- Operating System: Windows 10
- JDK version: JDK 13
- Visual Studio Code version: VS Code 1.42.0
- Java extension version: 0.55.1
Steps To Reproduce
Copy-paste the code below in a Java file & try autocompletion. Note that autocompletion does work on the line outside the lambda.
import java.util.Map;
class Test {
static class Employee {
final String name;
Employee(String name) {
this.name = name;
}
String name() {
return name;
}
}
public static void main(String... args) {
var totals = Map.of(new Employee("John"), 0);
Employee e = new Employee("Jane");
//totals.put(e., 0);
List.of("foo").forEach(item -> {
totals.put(e., 0);
});
}
}
Current Result

Expected Result
Autocompletion provides suggestions.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Use the Java snippet and the listed Windows, JDK, VS Code, and Java extension versions to reproduce the missing suggestions inside the lambda, then compare with completion on the commented line outside it. Done means autocompletion provides suggestions for e. inside the lambda; the issue names no source files or tests, so the completion entry point must be located first.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100