this executes as expected on evm.codes

seems to be a bug in foundry that causes the stack underflow. tbd

Author: z80dev

examples/long_jump.huff

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+#define macro MAIN() = takes (0) returns (1) {
+    // This is a test for long jumps
+    // We'll create a lot of opcodes before the label to push the offset beyond 255 bytes
+
+    0x01 0x01 add
+    0x01 add
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+
+    // Store "Hello, World!" in memory
+    0x48656c6c6f2c20576f726c6421
+    0x00 mstore
+
+    // Jump to success label (should be beyond byte 255)
+    success
+    jump
+
+    // Revert if this point is reached
+    0x00 0x00 revert
+
+    success:
+        0x20 0x00 return
+}

test/LongJumps.t.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import {Test, console} from "forge-std/Test.sol";
+import {PuffDeployer} from "../src/Deployers.sol";
+
+// These interfaces define callable functions on our test contracts
+interface ISaysHello {
+    function sayHello() external view returns (bytes32);
+}
+
+contract LongJumpsTest is Test {
+    PuffDeployer public puffDeployer;
+
+    function setUp() public {
+        puffDeployer = new PuffDeployer();
+    }
+
+    function test_longJump() public {
+        address newContract = puffDeployer.deployContract("examples/long_jump.huff");
+        ISaysHello jumper = ISaysHello(newContract);
+        bytes32 message = jumper.sayHello();
+        
+        // The expected output is "Hello, World!" right-aligned in a bytes32
+
+        assertEq(message, 0x0000000000000000000000000000000000000048656c6c6f2c20576f726c6421);
+    }
+
+}