Deno panics with import assertions

[saschanaz]

import foo from "./foo.json" assert { type: "json" }; causes Deno to panic.

> deno run --allow-write index.ts
thread 'main' panicked at 'called expect on Ident(Ident { span: Span { lo: BytePos(39), hi: BytePos(43), ctxt: #0 }, sym: Atom('type' type=static), optional: false })', C:\Users\runneradmin\.cargo\registry\src\github.com-1ecc6299db9ec823\swc_ecma_ast-0.55.0\src\prop.rs:93:20
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

> deno --version
deno 1.16.4 (release, x86_64-pc-windows-msvc)
v8 9.7.106.15
typescript 4.4.2

[bartlomieju]

Import assertions are not yet supported in Deno. They are covered in #7623 and will ship in #12866. @dsherret will ship a fix to this panic next week.

[bartlomieju]

Actually, let's keep it open.

[bartlomieju]

@dsherret it seems we're still panicking after upgrades of SWC and deno_ast; and the setting is on: https://github.com/denoland/deno_ast/blob/444b4497bcffc07e4b09cb872c9782dedd81ab6a/src/parsing.rs#L240-L251

[bartlomieju]

It's a bug in SWC, I'm working on a fix.

[bartlomieju]

Opened swc-project/swc#3005