Bus Error on Raspberry Pi 4 B When Running Linked List Append

[MjMoshiri]

Description

When attempting to run a simple linked list implementation that appends nodes to the list in a loop, I encounter a "bus error" on a Raspberry Pi 4 Model B. Interestingly enough when I compile the same to some other targets (e.g. WASI) it works.

Environment

Hardware: Raspberry Pi 4 Model B
Operating System: Linux raspberrypi 6.1.0-rpi7-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) aarch64 GNU/Linux
TinyGo Version: tinygo version 0.31.1 linux/arm64 (using go version go1.22.0 and LLVM version 17.0.1)

Affected Code:

package main

import (
	"time"
)

type Node struct {
	data int
	next *Node
}

func append(head *Node, data int) *Node {
	newNode := &Node{data: data}

	if head == nil {
		head = newNode
	} else {
		currentNode := head
		for currentNode.next != nil {
			currentNode = currentNode.next
		}
		currentNode.next = newNode
	}

	return head
}

func main() {
	start := time.Now()

	var head *Node
	for i := 0; i < 10000; i++ {
		head = append(head, i)
	}
	duration := time.Since(start)
	println(duration.Nanoseconds())
}

Compiled Using

GOARCH=arm64 GOOS=linux GOGC=off tinygo build -opt=0 -scheduler=none

[aykevl]

Have you tried without -opt=0? Disabling optimizations often leads to bugs.

I might remove that flag entirely, I've seen so many bug reports where -opt=0 was causing bugs.