From 38d1abc13a470fbadc765b88155d86ac05e1a53f Mon Sep 17 00:00:00 2001
From: Bruce Weirdan <weirdan@gmail.com>
Date: Fri, 24 Feb 2023 20:38:15 -0400
Subject: [PATCH] Don't crash on empty `jit_buffer_size`

Fixes vimeo/psalm#9396
---
 src/Psalm/Internal/Fork/PsalmRestarter.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Psalm/Internal/Fork/PsalmRestarter.php b/src/Psalm/Internal/Fork/PsalmRestarter.php
index 589c354ca..32c255ca2 100644
--- a/src/Psalm/Internal/Fork/PsalmRestarter.php
+++ b/src/Psalm/Internal/Fork/PsalmRestarter.php
@@ -87,6 +87,10 @@ class PsalmRestarter extends XdebugHandler
 
     private static function toBytes(string $value): int
     {
+        if (strlen($value) === 0) {
+            return 0;
+        }
+
         $unit = strtolower($value[strlen($value) - 1]);
 
         if (in_array($unit, ['g', 'm', 'k'], true)) {