From 4e82233cbce93064ac3ae0a996ee7dcfa5de1687 Mon Sep 17 00:00:00 2001
From: Skylot <118523+skylot@users.noreply.github.com>
Date: Mon, 26 Jan 2026 18:51:39 +0000
Subject: [PATCH] fix(java-input): fix `dup2_x1` stack to regs conversion for
 wide types (#2755)

---
 .../tests/integration/jbc/TestDup2x1.java     | 26 +++++++++++++++++++
 .../java/data/code/JavaInsnsRegister.java     |  2 +-
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 jadx-core/src/test/java/jadx/tests/integration/jbc/TestDup2x1.java

diff --git a/jadx-core/src/test/java/jadx/tests/integration/jbc/TestDup2x1.java b/jadx-core/src/test/java/jadx/tests/integration/jbc/TestDup2x1.java
new file mode 100644
index 000000000..6267d5c48
--- /dev/null
+++ b/jadx-core/src/test/java/jadx/tests/integration/jbc/TestDup2x1.java
@@ -0,0 +1,26 @@
+package jadx.tests.integration.jbc;
+
+import jadx.tests.api.IntegrationTest;
+import jadx.tests.api.extensions.profiles.TestProfile;
+import jadx.tests.api.extensions.profiles.TestWithProfiles;
+
+import static jadx.tests.api.utils.assertj.JadxAssertions.assertThat;
+
+public class TestDup2x1 extends IntegrationTest {
+
+	@SuppressWarnings({ "FieldCanBeLocal", "checkstyle:InnerAssignment", "unused" })
+	public static class TestCls {
+		private long value;
+
+		public long setValue(long v) {
+			return this.value = v;
+		}
+	}
+
+	@TestWithProfiles(TestProfile.JAVA11)
+	public void test() {
+		assertThat(getClassNode(TestCls.class))
+				.code()
+				.containsOne("this.value = v;");
+	}
+}
diff --git a/jadx-plugins/jadx-java-input/src/main/java/jadx/plugins/input/java/data/code/JavaInsnsRegister.java b/jadx-plugins/jadx-java-input/src/main/java/jadx/plugins/input/java/data/code/JavaInsnsRegister.java
index a5d1a38f5..031bac4c7 100644
--- a/jadx-plugins/jadx-java-input/src/main/java/jadx/plugins/input/java/data/code/JavaInsnsRegister.java
+++ b/jadx-plugins/jadx-java-input/src/main/java/jadx/plugins/input/java/data/code/JavaInsnsRegister.java
@@ -310,7 +310,7 @@ public class JavaInsnsRegister {
 			s.peekFrom(4, 8).peekFrom(1, 9);
 		} else {
 			s.insn().setRegsCount(6);
-			s.insert(2, WIDE);
+			s.insert(1, WIDE);
 			s.peekFrom(0, 0).peekFrom(1, 1);
 			s.peekFrom(1, 2).peekFrom(2, 3);
 			s.peekFrom(2, 4).peekFrom(0, 5);