From 170b640bcfc9b913201638b8024ca636d49e2371 Mon Sep 17 00:00:00 2001
From: Ryan Gonzalez <git@refi64.dev>
Date: Tue, 31 Oct 2023 05:02:17 -0500
Subject: [PATCH] Fix `Process.exists?` throwing errors on EPERM (#13911)

---
 src/crystal/system/unix/process.cr | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/crystal/system/unix/process.cr b/src/crystal/system/unix/process.cr
index f07a91806857..0d4b3c1a9235 100644
--- a/src/crystal/system/unix/process.cr
+++ b/src/crystal/system/unix/process.cr
@@ -79,8 +79,14 @@ struct Crystal::System::Process
     if ret == 0
       true
     else
-      return false if Errno.value == Errno::ESRCH
-      raise RuntimeError.from_errno("kill")
+      case Errno.value
+      when Errno::EPERM
+        true
+      when Errno::ESRCH
+        false
+      else
+        raise RuntimeError.from_errno("kill")
+      end
     end
   end