Psalm crashes for @param int|array|? $i

[TysonAndre]

Expected: Should warn about unparsable docblock and not crash (standalone ? is nonsense)
Observed: Crashes with uncaught TypeError - psalm.dev does not like this example

<?php

/**
 * @return int|array|? $i
 */
function takesAnInt($i) {
}

Scanning files...
Notice: Undefined offset: 0 in /path/to/psalm/src/Psalm/Internal/Type/TypeParser.php on line 346
Uncaught TypeError: Argument 1 passed to Psalm\Internal\Type\TypeParser::getTypeFromTree() must be an instance of Psalm\Internal\Type\ParseTree, null given, called in /path/to/psalm/src/Psalm/Internal/Type/TypeParser.php on line 350 and defined in /path/to/psalm/src/Psalm/Internal/Type/TypeParser.php:114
Stack trace:
#0 /path/to/psalm/src/Psalm/Internal/Type/TypeParser.php(350): Psalm\Internal\Type\TypeParser::getTypeFromTree(NULL, Object(Psalm\Codebase), NULL, Array, Array)
#1 /path/to/psalm/src/Psalm/Internal/Type/TypeParser.php(92): Psalm\Internal\Type\TypeParser::getTypeFromTree(Object(Psalm\Internal\Type\ParseTree\UnionTree), Object(Psalm\Codebase), NULL, Array, Array)
#2 /path/to/psalm/src/Psalm/Internal/PhpVisitor/ReflectorVisitor.php(2732): Psalm\Internal\Type\TypeParser::parseTokens(Array, NULL, Array, Array)
#3 /path/to/psalm/src/Psalm/Internal/PhpVisitor/ReflectorVisitor.php(337): Psalm\Internal\PhpVisitor\ReflectorVisitor->registerFunctionLike(Object(PhpParser\Node\Stmt\Function_))
#4 /path/to/psalm/vendor/nikic/php-parser/lib/PhpParser/NodeTraverser.php(200): Psalm\Internal\PhpVisitor\ReflectorVisitor->enterNode(Object(PhpParser\Node\Stmt\Function_))
#5 /path/to/psalm/vendor/nikic/php-parser/lib/PhpParser/NodeTraverser.php(91): PhpParser\NodeTraverser->traverseArray(Array)
#6 /path/to/psalm/src/Psalm/Internal/Scanner/FileScanner.php(94): PhpParser\NodeTraverser->traverse(Array)
#7 /path/to/psalm/src/Psalm/Internal/Codebase/Scanner.php(614): Psalm\Internal\Scanner\FileScanner->scan(Object(Psalm\Codebase), Object(Psalm\Storage\FileStorage), false, Object(Psalm\Progress\DefaultProgress))
#8 /path/to/psalm/src/Psalm/Internal/Codebase/Scanner.php(370): Psalm\Internal\Codebase\Scanner->scanFile('/path/to...', Array, true)
#9 /path/to/psalm/src/Psalm/Internal/Codebase/Scanner.php(482): Psalm\Internal\Codebase\Scanner->Psalm\Internal\Codebase\{closure}(0, '/path/to...')
#10 /path/to/psalm/src/Psalm/Internal/Codebase/Scanner.php(328): Psalm\Internal\Codebase\Scanner->scanFilePaths(1)
#11 /path/to/psalm/src/Psalm/Codebase.php(477): Psalm\Internal\Codebase\Scanner->scanFiles(Object(Psalm\Internal\Codebase\ClassLikes), 7)
#12 /path/to/psalm/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php(572): Psalm\Codebase->scanFiles(7)
#13 /path/to/psalm/src/psalm.php(602): Psalm\Internal\Analyzer\ProjectAnalyzer->check('/path/to...', false)
#14 /path/to/psalm/psalm(2): require_once('/path/to...')
#15 {main}
(Psalm 3.x-dev@537a1194e58da753cad0ab2d271017ca1024418a crashed due to an uncaught Throwable)