Description:
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The introduced feature ::class on objects is throwing a syntax error when being used in string concatenation using curly braces.

Error:
PHP Parse error:  syntax error, unexpected token "}", expecting "->" or "?->" or "{" or "[" in php shell code on line 1



Test script:
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class Test {};
$a = new Test();
echo "Test " . $a::class;
echo "Test {$a::class}";



Expected result:
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In my opinion the lines 3 and 4 should output the same result "Test Test"