Undefined index warnings and notices in ClosureAnalyzer #5255
Description
https://psalm.dev/r/c6cc4713ae
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<b>Notice</b>: Undefined index: $b in <b>/var/www/vhosts/psalm.dev/httpdocs/vendor/vimeo/psalm/src/Psalm/Internal/Analyzer/ClosureAnalyzer.php</b> on line <b>137</b><br />
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<b>Notice</b>: Trying to get property 'parent_nodes' of non-object in <b>/var/www/vhosts/psalm.dev/httpdocs/vendor/vimeo/psalm/src/Psalm/Internal/Analyzer/ClosureAnalyzer.php</b> on line <b>137</b><br />
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<b>Warning</b>: Invalid argument supplied for foreach() in <b>/var/www/vhosts/psalm.dev/httpdocs/vendor/vimeo/psalm/src/Psalm/Internal/Analyzer/ClosureAnalyzer.php</b> on line <b>139</b><br />