From: from-ruby-lang@...
Date: 2019-06-17T09:27:37+00:00
Subject: [ruby-core:93199] [Ruby trunk Bug#15932] wrong "void value expression" error for 'next' or 'break' statements inside an 'if' assignment

Issue #15932 has been reported by cvss (Cyril Vechera).

----------------------------------------
Bug #15932: wrong "void value expression" error for 'next' or 'break' statements inside an 'if' assignment
https://bugs.ruby-lang.org/issues/15932

* Author: cvss (Cyril Vechera)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 1.8.7 .. 2.7.0preview1
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
When a 'next' or 'break' statement for block/loop control is placed inside an 'if' assignment, the parser outputs an error "void value expression". The same parsing error raises for the ternary operator in the same conditions.

I think, the the correct behavior should be consistent with the behavior of the 'case' statement, that is parsing such a code without errors and leaving the right-side variable with 'nil' value.

Examples of code giving a "void value expression" error:

1.

```
begin
	a = if false
		'A'
	else
		next
	end
end while false
```

2.
```
begin
	a = false ? 'A' : next
end while false
```

Example of code running without errors:

3.
```
begin
	a = case false
		when true
			'A'
		else
			next
		end
end while false
```

4.
```
begin
	a = (false or next)
end while false
```




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