Deno crash when specifying sourceURL comment during async code evaluation.

[garethj2]

Version: Deno 1.45.4

Run this code and Deno will crash...

const AsyncFunction = Object.getPrototypeOf(async function () {
	// empty
}).constructor

const func = new AsyncFunction(
	`return doesNotExist();
    //# sourceURL=empty.eval`
)

func.call({})

...with this output...

Deno has panicked. This is a bug in Deno. Please report this
at https://github.com/denoland/deno/issues/new.
If you can reliably reproduce this panic, include the
reproduction steps and re-run with the RUST_BACKTRACE=1 env
var set and include the backtrace in your report.

Platform: macos aarch64
Version: 1.45.4
Args: ["deno", "run", "crash.ts"]

thread 'main' panicked at /Users/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/deno_core-0.299.0/error.rs:1245:36:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

To resolve, simply remove the sourceURL line. Now it'll fail as expected.

[bartlomieju]

Most likely will be addressed by denoland/deno_core#819

[bartlomieju]

Let's keep this one open until we upgrade deno_core to a version that contains the fix.