From bd20c5e791abb4d8bc90e9cb78aa75c00a851bc5 Mon Sep 17 00:00:00 2001
From: Justin Starry <justin@solana.com>
Date: Mon, 26 Aug 2019 16:31:06 -0400
Subject: [PATCH] Add test case for u128 panic (#5601)

* u128 panic

* Add test case for u128 memory out of bounds error

* Fix check
---
 programs/bpf/rust/128bit/src/lib.rs     | 6 ++++++
 programs/bpf/rust/128bit_dep/src/lib.rs | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/programs/bpf/rust/128bit/src/lib.rs b/programs/bpf/rust/128bit/src/lib.rs
index c7bfe1a0d2..4609577dea 100644
--- a/programs/bpf/rust/128bit/src/lib.rs
+++ b/programs/bpf/rust/128bit/src/lib.rs
@@ -24,6 +24,12 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> bool {
     z -= 1;
     assert_eq!(z, 340_282_366_920_938_463_463_374_607_431_768_211_454);
 
+    // ISSUE: https://github.com/solana-labs/solana/issues/5600
+    // assert_eq!(u128::from(1u32.to_be()), 1);
+
+    // ISSUE: https://github.com/solana-labs/solana/issues/5619
+    // solana_bpf_rust_128bit_dep::two_thirds(10);
+
     let x = u64::max_value();
     assert_eq!(u128::from(x) + u128::from(x), 36_893_488_147_419_103_230);
 
diff --git a/programs/bpf/rust/128bit_dep/src/lib.rs b/programs/bpf/rust/128bit_dep/src/lib.rs
index 497d8c65ab..451cc29670 100644
--- a/programs/bpf/rust/128bit_dep/src/lib.rs
+++ b/programs/bpf/rust/128bit_dep/src/lib.rs
@@ -8,6 +8,10 @@ pub fn work(x: u128, y: u128) -> u128 {
     x + y
 }
 
+pub fn two_thirds(x: u128) -> u128 {
+    2 * x / 3
+}
+
 #[cfg(test)]
 mod test {
     extern crate std;