From edaa27ce45dacd5e972781105a8e7ba4abe77c3d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 5 Jun 2025 22:22:24 +0900
Subject: [PATCH] Suppress warnings by gcc-13 with `-Og`

---
 ext/socket/raddrinfo.c | 2 +-
 process.c              | 2 +-
 symbol.c               | 4 ++--
 variable.c             | 2 ++
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/ext/socket/raddrinfo.c b/ext/socket/raddrinfo.c
index d1c0100023..fa98cc9c80 100644
--- a/ext/socket/raddrinfo.c
+++ b/ext/socket/raddrinfo.c
@@ -715,7 +715,7 @@ rb_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 {
     int retry;
     struct getnameinfo_arg *arg;
-    int err, gni_errno = 0;
+    int err = 0, gni_errno = 0;
 
 start:
     retry = 0;
diff --git a/process.c b/process.c
index f8d738a98c..2938411c43 100644
--- a/process.c
+++ b/process.c
@@ -4122,7 +4122,7 @@ rb_fork_ruby(int *status)
 {
     struct rb_process_status child = {.status = 0};
     rb_pid_t pid;
-    int try_gc = 1, err;
+    int try_gc = 1, err = 0;
     struct child_handler_disabler_state old;
 
     do {
diff --git a/symbol.c b/symbol.c
index 4e590eb8ec..0bd60aec34 100644
--- a/symbol.c
+++ b/symbol.c
@@ -883,7 +883,7 @@ rb_gc_free_dsymbol(VALUE sym)
 VALUE
 rb_str_intern(VALUE str)
 {
-    VALUE sym;
+    VALUE sym = 0;
 
     GLOBAL_SYMBOLS_LOCKING(symbols) {
         sym = lookup_str_sym_with_lock(symbols, str);
@@ -920,7 +920,7 @@ rb_str_intern(VALUE str)
 ID
 rb_sym2id(VALUE sym)
 {
-    ID id;
+    ID id = 0;
     if (STATIC_SYM_P(sym)) {
         id = STATIC_SYM2ID(sym);
     }
diff --git a/variable.c b/variable.c
index 288692ed4d..bdf18b8e4f 100644
--- a/variable.c
+++ b/variable.c
@@ -2248,6 +2248,8 @@ iterate_over_shapes_with_callback(rb_shape_t *shape, rb_ivar_foreach_callback_fu
             }
         }
         return false;
+      default:
+        UNREACHABLE_RETURN(false);
     }
 }