Compare 

 
(time ? ($count=()) : $a) = Foo(); ## list+scalar
(time ? @a : $a) = Foo(); ## list+scalar
(time ? (@a=()) : $a) = Foo();  ## list+scalar
(time ? $a=() : $a) = Foo(); ## scalar is scalar
(time ? @a=() : $a) = Foo(); ## skates through as scalar $a[0]

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It appears perl doesn't recognize the array+assignment(accumulator) as a list without an extra parenthesis, so it does what it thinks should happen

Is this a bug? Yes, in that it already protects programmers from this misunderstanding ( perldiag#Assignment to both a list and a scalar), but it missed this particular variant

Also, Deparse isn't bulletproof :) Deparse says \my(%hash) is the same as \my %hash but it isn't

In reply to Re^4: ternary operator as lvalue failing to induce evaluation of right-hand expression in list context (accumulator) by Anonymous Monk
in thread ternary operator as lvalue failing to induce evaluation of right-hand expression in list context by ed_hoch

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