Fixed GH-22727: Attribute return opcodes to return statement

[joostwaaijer]

Note

This pull request description was prepared with assistance from OpenAI Codex and reviewed by the contributor.

zend_compile_return() currently leaves CG(zend_lineno) at the last line compiled inside a multiline return expression. As a result, VERIFY_RETURN_TYPE and RETURN are attributed to a match arm or ternary branch instead of the return statement. Coverage drivers then omit the actual return line and may report a different branch line as executed. This is the specific return-expression case described in GH-22727 and is part of the broader GH-18985 issue.

This patch captures the statement line before compiling the expression and restores it before emitting return-related opcodes. It deliberately avoids the broader expression compiler changes from GH-22833 that were reverted.

A PHPT regression test verifies the user-visible TypeError line. The test fails on PHP 8.4.24 with line 6 instead of line 5, and passes on the patched PHP 8.4.26-dev build.

Validation: debug NTS build with all Zend/tests (4,837 passed, 134 skipped, 1 expected failure, 0 failures); debug ZTS build with the focused regression test; and PCOV 1.0.12 verification showing the direct return match line changes from absent to hit count 1.

[NickSdot]

Suggested change

	} catch (TypeError $exception) {
	echo $exception->getLine(), "\n";
	}
	?>
	--EXPECT--
	5
	} catch (Throwable $e) {
	echo $e::class, ': on line ', $e->getLine(), "\n";
	}
	?>
	--EXPECT--
	TypeError: on line 5