From 385bf139c12a9411b49f65bd65fe86936186ea30 Mon Sep 17 00:00:00 2001
From: ZeroEkkusu <94782988+ZeroEkkusu@users.noreply.github.com>
Date: Mon, 28 Feb 2022 13:38:57 +0100
Subject: [PATCH 1/2] feat(stdError): add `lowLevelError`

---
 src/stdlib.sol          | 1 +
 src/test/StdError.t.sol | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/stdlib.sol b/src/stdlib.sol
index d895915e..24262d46 100644
--- a/src/stdlib.sol
+++ b/src/stdlib.sol
@@ -109,6 +109,7 @@ library stdError {
     bytes public constant indexOOBError = abi.encodeWithSignature("Panic(uint256)", 0x32);
     bytes public constant memOverflowError = abi.encodeWithSignature("Panic(uint256)", 0x41);
     bytes public constant zeroVarError = abi.encodeWithSignature("Panic(uint256)", 0x51);
+    bytes public constant lowLevelError = bytes(""); // `0x`
 }
 
 struct StdStorage {
diff --git a/src/test/StdError.t.sol b/src/test/StdError.t.sol
index 46014d94..511b8227 100644
--- a/src/test/StdError.t.sol
+++ b/src/test/StdError.t.sol
@@ -58,6 +58,11 @@ contract StdErrorsTest is DSTest {
         test.intern();
     }
 
+    function testExpectLowLvl() public {
+        vm.expectRevert(stdError.lowLevelError);
+        test.someArr(0);
+    }
+
     // TODO: figure out how to trigger encodeStorageError?
 }
 
@@ -66,7 +71,7 @@ contract ErrorsTest {
         T1
     }
 
-    uint256[] someArr;
+    uint256[] public someArr;
 
     function assertionError() public pure {
         assert(false);

From cfa392508df12bcedbd5face0e41dde26cc9f4d7 Mon Sep 17 00:00:00 2001
From: ZeroEkkusu <94782988+ZeroEkkusu@users.noreply.github.com>
Date: Wed, 2 Mar 2022 17:21:02 +0100
Subject: [PATCH 2/2] test(stdError): add `testExpectEncodeStg`

---
 src/test/StdError.t.sol | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/test/StdError.t.sol b/src/test/StdError.t.sol
index 511b8227..f55fff1e 100644
--- a/src/test/StdError.t.sol
+++ b/src/test/StdError.t.sol
@@ -38,6 +38,11 @@ contract StdErrorsTest is DSTest {
         test.enumConversion(1);
     }
 
+    function testExpectEncodeStg() public {
+        vm.expectRevert(stdError.encodeStorageError);
+        test.encodeStgError();
+    }
+
     function testExpectPop() public {
         vm.expectRevert(stdError.popError);
         test.pop();
@@ -72,6 +77,7 @@ contract ErrorsTest {
     }
 
     uint256[] public someArr;
+    bytes someBytes;
 
     function assertionError() public pure {
         assert(false);
@@ -93,6 +99,13 @@ contract ErrorsTest {
         T(a);
     }
 
+    function encodeStgError() public {
+        assembly {
+            sstore(someBytes.slot, 1)
+        }
+        bytes memory b = someBytes;
+    }
+
     function pop() public {
         someArr.pop();
     }