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<?php function foo() { foreach ([] as $foo) { yield $foo; } } $iterator = new AppendIterator(); $iterator->append(foo()); var_dump(iterator_to_array($iterator));
Output for 7.0.10 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Exception: Cannot traverse an already closed generator in /in/q3I67:9 Stack trace: #0 [internal function]: AppendIterator->rewind() #1 /in/q3I67(9): iterator_to_array(Object(AppendIterator)) #2 {main} thrown in /in/q3I67 on line 9
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.24, 7.0.0 - 7.0.9

Process exited with code 139.
Output for 5.6.25 - 5.6.40
Fatal error: Uncaught exception 'Exception' with message 'Cannot traverse an already closed generator' in /in/q3I67:9 Stack trace: #0 [internal function]: AppendIterator->rewind() #1 /in/q3I67(9): iterator_to_array(Object(AppendIterator)) #2 {main} thrown in /in/q3I67 on line 9
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$foo' (T_VARIABLE) in /in/q3I67 on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/q3I67 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/q3I67 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/q3I67 on line 3
Process exited with code 255.

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