Native binary hangs on VMs

“Affects both install and interactive claude launch.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/claude-code/issues/3220/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Native binary hangs at 100% CPU on VMs with masked CPU features. claude install and interactive launch pin one core, produce no output and ignore Ctrl-C on Hyper-V compatibility mode or kvm64 guests.

Is this your bug?

File my report

Where: native binary installer
Versions: 2.1.267 to 2.1.278
Platforms: Linux
How bad: Stops work: a core feature can't be used.

Not quite your bug?

Fails on CPUs without AVX4 people

Original reports2, newest first

Sep 23, 2026Claude Code install/launch hangs indefinitely on Hyper-V VM with Processor Compatibility Mode enabled#96237
Sep 19, 2026Native binary hangs silently at 100% CPU on VMs with the kvm64 CPU model (no SSE4/POPCNT) — needs a CPU feature pre-flight check#95566

Native binary hangs on VMs

Is this your bug? What gets counted gets fixed. Pile on.

Is this your bug?

Not quite your bug?

Original reports2, newest first

Do you work on Claude Code?