From fde6d641bd677e755b40b93e92ee55c52eb60850 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Wed, 11 Mar 2026 12:37:21 +0300
Subject: [PATCH] cgen: initializing struct in channel bug (fixes #10342)

---
 vlib/v/gen/c/cgen.v                      |  2 +-
 vlib/v/tests/concurrency/channels_test.v | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index 426ea3a9a..49f91ec47 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -1938,7 +1938,7 @@ pub fn (mut g Gen) write_typedef_types() {
 						push_arg := el_stype + if is_fixed_arr { '*' } else { '' }
 						g.channel_definitions.writeln('
 static inline ${el_stype} __${sym.cname}_popval(${sym.cname} ch) {
-	${el_stype} val;
+	${el_stype} val = {0};
 	sync__Channel_try_pop_priv(ch, ${val_arg_pop}, false);
 	return val;
 }')
diff --git a/vlib/v/tests/concurrency/channels_test.v b/vlib/v/tests/concurrency/channels_test.v
index 86c3be4f3..af7c1e0b7 100644
--- a/vlib/v/tests/concurrency/channels_test.v
+++ b/vlib/v/tests/concurrency/channels_test.v
@@ -1,3 +1,5 @@
+import time
+
 struct St1 {
 	val     int = 5
 	another chan f64
@@ -72,3 +74,11 @@ fn test_channel_with_or_block() {
 	println(ret)
 	assert false
 }
+
+fn test_closed_channel_returns_zero_value_struct() {
+	ch := chan time.Time{}
+	ch.close()
+	got := <-ch
+	assert got == time.Time{}
+	assert got.str() == '0000-00-00 00:00:00'
+}
-- 
2.39.5