All news with #arm64 tag

How Cloudflare Found and Fixed a Bug in Go's ARM64 Compiler

🔍 Cloudflare engineers describe discovering a rare race condition in the Go arm64 compiler that caused goroutine stack-unwinding crashes in production. They traced sporadic fatal panics and segfaults to async preemption interrupting a split stack-pointer adjustment, leaving an invalid stack frame. A minimal reproducer showed the assembler could split a large ADD into multiple instructions, creating a one-instruction window where preemption caused unwinder corruption. The issue was fixed upstream in go1.23.12, go1.24.6, and go1.25.0.

Microsoft Media Creation Tool Fails on Windows 11 ARM64

⚠️ Microsoft has confirmed that the Windows 11 Media Creation Tool (version 26100.6584), released on September 29, 2025, may not run on devices with Arm64 processors after the Windows 11 25H2 rollout. Affected users report an error that reads, "We're not sure what happened, but we're unable to run this tool on your PC," blocking creation of bootable installation media. Microsoft says the tool does not support creating media for Arm64 devices and that the normally available ability for Arm64 systems to produce x64 media is also failing. As a temporary workaround, Microsoft recommends using a PC with an AMD64 processor to create installation media while it investigates and prepares a fix.