Boolean product attributes are not visible

[bkristl]

If product has boolean attribute, this attribute is not visible on product page view.

For example:
We have product tv, which have attribute:
attribute_code: convr2d3d
frontend_label: Conversation 2D to 3D
frontend_input: boolean

This attribute is not visible on product page in tab More Information.

In this tab must be visible:
Conversation 2D to 3D: Yes
or
Conversation 2D to 3D: No

Depends of value and selected language.

This happens, because in file: magento/module-catalog/Block/Product/View/Attributes.php
in function: public function getAdditionalData(array $excludeAttr = [])
we get value of attribute with: $value = $attribute->getFrontend()->getValue($product);

But instead of returning a (string) value we get a class:
class Magento\Framework\Phrase {
private $text =>
string(3) "Yes"
private $arguments =>
array(0) {
}
}

So in the same function getAdditionalData is checked if is value is type of string.

We have Magento 2.0.7 version.

[veloraven]

@bkristl thank you for your report.
We have internal ticket MAGETWO-59267 created for issue #6634.
So I'm closing this issue as duplicate.