Weird revert with forge test

[CaledoniaProject]

I have a simple contract that emits logs on transfer:

King.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

import "forge-std/Test.sol";

contract King is Test {
    constructor() public payable {}

    receive() external payable {
        log_named_address("receive() from", msg.sender);
        log_named_uint("value is", msg.value);
    }
}

And the test contract, aka King.t.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.0;

import {King} from "../src/King.sol";
import "forge-std/Test.sol";

contract KingTest is Test {
    function setUp() public {}

    function testExample() public {
        King king = new King();
        address(king).transfer(1 ether);
    }
}

When I run forge test -vvv:

%> forge test -vvv
[⠑] Compiling...
[⠘] Compiling 1 files with 0.6.12
[⠢] Compiling 1 files with 0.8.15
[⠰] Solc 0.6.12 finished in 1.32s
[⠘] Solc 0.8.15 finished in 1.34s
Compiler run successful

Running 1 test for test/King.t.sol:KingTest
[FAIL. Reason: Revert] testExample() (gas: 256033)
Logs:
  receive() from: 0xb4c79dab8f259c7aee6e5b2aa729821864227e84

Traces:
  [256033] KingTest::testExample()
    ├─ [214353] → new King@"0xce71…c246"
    │   └─ ← 960 bytes of code
    ├─ [2040] King::fallback{value: 1000000000000000000}()
    │   ├─ emit log_named_address(key: "receive() from", val: KingTest: [0xb4c79dab8f259c7aee6e5b2aa729821864227e84])
    │   └─ ← ()
    └─ ← ()

Test result: FAILED. 0 passed; 1 failed; finished in 446.31µs

Failed tests:
[FAIL. Reason: Revert] testExample() (gas: 256033)

Encountered a total of 1 failing tests, 0 tests succeeded

And it failed while accessing msg.value, what was wrong?

[onbjerg]

When you use address.transfer, the gas limit is set to 2300 gas (this is not because of Forge, this is just how it works). Emitting those logs cost 750 gas each for the LOG0 opcode alone, but there is additional opcodes involved as well (parsing the calldata, jumping, checking msg.value, pushing the strings etc.) so most likely you are running out of gas.