Correctly invoke @data vars passed to if/unless

Also added regression test for `@data` variables in partial block context.

Author: theodorejb

src/Compiler.php

@@ -346,14 +346,13 @@ private function canInlineConditional(BlockStatement $block, string $helperName,
     private function compileConditionalExpr(Expression $condExpr, bool $negate): string
     {
         $part = $condExpr instanceof PathExpression ? ($condExpr->parts[0] ?? null) : null;
-        if ($condExpr instanceof PathExpression
-            && !$condExpr->data
+        $isSimplePath = $condExpr instanceof PathExpression
             && $condExpr->depth === 0
             && is_string($part)
-            && count($condExpr->parts) === 1
-            && !self::scopedId($condExpr)
-            && $this->lookupBlockParam($part) === null
-        ) {
+            && count($condExpr->parts) === 1;
+        if ($isSimplePath && $condExpr->data) {
+            $val = self::getRuntimeFunc('dv', $this->compileExpression($condExpr));
+        } elseif ($isSimplePath && !self::scopedId($condExpr) && $this->lookupBlockParam($part) === null) {
             $val = self::getRuntimeFunc('cv', '$in, ' . self::quote($part));
         } else {
             $savedHelperArgs = $this->compilingHelperArgs;

tests/RegressionTest.php

@@ -1846,6 +1846,12 @@ public static function ifElseProvider(): array
                 'data' => ['items' => [['name' => 'Item', 'falsy' => false]], 'name' => 'Root'],
                 'expected' => 'Root',
             ],
+
+            'closure in @data variable passed to if is invoked' => [
+                'template' => '{{#if @foo}}bad{{else}}Executed with no args{{/if}}',
+                'vars' => ['foo' => fn(...$args) => count($args)],
+                'expected' => 'Executed with no args',
+            ],
         ];
     }