regression: importing from .d.ts files causes panic

[lucacasonato]

$ deno info --no-check https://deno.land/x/garn_validator@v1.2.24/src/index.d.ts
Warning Failed to get compiled source code of "https://deno.land/x/garn_validator@v1.2.24/src/index.d.ts".
Reason: No such file or directory (os error 2)
If the source file provides only type exports, prefer to use "import type" or "export type" syntax instead.
Warning Failed to get compiled source code of "https://deno.land/x/garn_validator@v1.2.24/src/index.d.ts".
Reason: No such file or directory (os error 2)
If the source file provides only type exports, prefer to use "import type" or "export type" syntax instead.
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: ErrBox(Os { code: 2, kind: NotFound, message: "No such file or directory" })', cli/main.rs:234:32
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

This broke between 1.2.0 and 1.2.1. It happens with and without --no-check. We are meant to be emitting an empty file, but it doesn't seem to be working anymore. Ref #6760

cc @bartlomieju

[kitsonk]

Roots are handled differently than depended upon modules. #6760 only "fixed" when the ts compiler ops out for a dependency.

[bartlomieju]

Closed in #6786