CLI segfault with import() / async fn

[soncodi]

• Version: node v14.16.0
• Platform: Ubuntu 20.10 -- Linux 5.8.0-44-generic 50-Ubuntu SMP Tue Feb 9 06:29:41 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

What steps will reproduce the bug?

run the following in the node CLI:

x = async () => { try { await import('_'); } catch {} }
// ... wait a bit
x()
// ... wait a bit
x() // segfault (may take a few tries)

How often does it reproduce? Is there a required condition?

Reproduces reliably; try pressing <enter> and/or waiting a few seconds between invoking x().

What is the expected behavior?

No segfault

What do you see instead?

CLI segfaults

[devsnek]

Duplicate of #35889