From 02c9ffd16b3324449cf8e6612a9896148a1be435 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Wed, 29 Oct 2025 17:28:01 -0700
Subject: [PATCH 1/3] ZJIT: Enable comments for --zjit-debug on dev builds

I wanted to see comments on test_zjit.rb failures.
---
 zjit/src/backend/lir.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/zjit/src/backend/lir.rs b/zjit/src/backend/lir.rs
index 005df140b8a613..cad369357f8117 100644
--- a/zjit/src/backend/lir.rs
+++ b/zjit/src/backend/lir.rs
@@ -2255,7 +2255,12 @@ impl Assembler {
 /// when not dumping disassembly.
 macro_rules! asm_comment {
     ($asm:expr, $($fmt:tt)*) => {
-        if $crate::options::get_option!(dump_disasm) || $crate::options::get_option!(dump_lir).is_some() {
+        // If --zjit-dump-disasm or --zjit-dump-lir is given, enrich them with comments.
+        // Also allow --zjit-debug on dev builds to enable comments since dev builds dump LIR on panic.
+        let enable_comment = $crate::options::get_option!(dump_disasm) ||
+            $crate::options::get_option!(dump_lir).is_some() ||
+            (cfg!(debug_assertions) && $crate::options::get_option!(debug));
+        if enable_comment {
             $asm.push_insn(crate::backend::lir::Insn::Comment(format!($($fmt)*)));
         }
     };

From 80e2b06d39d0986e8c88cba8946447c1e380aa85 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Wed, 29 Oct 2025 17:42:37 -0700
Subject: [PATCH 2/3] ZJIT: Limit the default size of LIR dump

For test_zjit.rb output, it was too long for a single test to print
thousands of lines.
---
 zjit/src/backend/lir.rs | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/zjit/src/backend/lir.rs b/zjit/src/backend/lir.rs
index cad369357f8117..a90e80bf4187b1 100644
--- a/zjit/src/backend/lir.rs
+++ b/zjit/src/backend/lir.rs
@@ -2288,6 +2288,10 @@ pub struct AssemblerPanicHook {
 }
 
 impl AssemblerPanicHook {
+    /// Maximum number of lines [`Self::dump_asm`] is allowed to dump by default.
+    /// When --zjit-dump-lir is given, this limit is ignored.
+    const MAX_DUMP_LINES: usize = 40;
+
     /// Install a panic hook to dump Assembler with insn_idx on dev builds.
     /// This returns shared references to the previous hook and insn_idx.
     /// It takes insn_idx as an argument so that you can manually use it
@@ -2325,8 +2329,19 @@ impl AssemblerPanicHook {
 
     /// Dump Assembler, highlighting the insn_idx line
     fn dump_asm(asm: &Assembler, insn_idx: usize) {
+        let lir_string = lir_string(asm);
+        let lines: Vec<&str> = lir_string.split('\n').collect();
+
+        // By default, dump only MAX_DUMP_LINES lines.
+        // Ignore it if --zjit-dump-lir is given.
+        let (min_idx, max_idx) = if get_option!(dump_lir).is_some() {
+            (0, lines.len())
+        } else {
+            (insn_idx.saturating_sub(Self::MAX_DUMP_LINES / 2), insn_idx.saturating_add(Self::MAX_DUMP_LINES / 2))
+        };
+
         println!("Failed to compile LIR at insn_idx={insn_idx}:");
-        for (idx, line) in lir_string(asm).split('\n').enumerate() {
+        for (idx, line) in lines.iter().enumerate().filter(|(idx, _)| (min_idx..=max_idx).contains(idx)) {
             if idx == insn_idx && line.starts_with("  ") {
                 println!("{BOLD_BEGIN}=>{}{BOLD_END}", &line["  ".len()..]);
             } else {

From 15f2dcceb4787c5738dde48f580019c3765ce1b8 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Thu, 30 Oct 2025 09:36:11 +0900
Subject: [PATCH 3/3] [ruby/resolv] Fallback to powershell implementation under
 the bundle environment

[Bug #21645]

win32-registory can't load fiddle if Gemfile didn't have that dependency.

https://github.com/ruby/resolv/commit/1319183a4b
---
 ext/win32/lib/win32/resolv.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/win32/lib/win32/resolv.rb b/ext/win32/lib/win32/resolv.rb
index 226de7cba36769..ef74a890bbaeea 100644
--- a/ext/win32/lib/win32/resolv.rb
+++ b/ext/win32/lib/win32/resolv.rb
@@ -58,7 +58,7 @@ def read_s(key)
         end
       end
       using SZ
-    rescue LoadError
+    rescue LoadError, Gem::LoadError
       require "open3"
     end