Compile Error 8.4.0

[xenoterracide]

this happens just by having a module that depends on ts-toolbelt installed

.yarn/cache/ts-toolbelt-npm-8.4.0-f6995cd030-dbc3ad2626.zip/node_modules/ts-toolbelt/out/index.d.ts:983:46 - error TS1110: Type expected.

983     export type NumberOf<N extends number> = `${N}`;

this repo reproduces the issue https://github.com/xenoterracide/merge-anything-compilation-issues you can do yarn && yarn build to see the issue.

cross referencing mesqueeb/merge-anything#13

[millsp]

I think that you need ts >= 4.1

[xenoterracide]

you mean typescript? that's not out yet... trying to clarify whether this is a problem where merge-anything needs to fix its deps. Since I don't have a direct dependency on ts-toolbelt

[millsp]

@mesqueeb's merge-anything is using the next version of ts-toolbelt. TypeScript 4.1 will be released in 5 days.

[xenoterracide]

This whole thing seems like a hot mess, thanks.

[mesqueeb]

@millsp I don't think I am?
https://github.com/mesqueeb/merge-anything/blob/production/package.json#L49

[millsp]

Yep, sorry @mesqueeb. Don't know how this happened.
https://www.npmjs.com/package/ts-toolbelt?activeTab=versions

[adomoshe]

To anyone facing this issue currently I just hard set my ts-toolbelt version in my lock file

[AlexeyDrobot]

An alternative way to install the correct version of the nested dependency.

"resolutions": { "ts-toolbelt": "8.0.7" },

[millsp]

Fixing this will cause breaking changes, it's not easy because there is global scope pollution. If I fix this, people using global imports will break. If I don't, it breaks only for people that use two different versions of ts-toolbelt at the same time. This has been fixed in version 9.

[themaskedavenger]

Specifying version 8.0.7 in resolutions, I am seeing the following errors:

> Transpiling typescript files...
node_modules/ts-toolbelt/out/index.d.ts:330:9 - error TS2574: A rest element type must be an array type.

330         ...L
            ~~~~

node_modules/ts-toolbelt/out/index.d.ts:840:9 - error TS1256: A rest element must be last in a tuple type.

840         ...L,
            ~~~~

node_modules/ts-toolbelt/out/index.d.ts:1985:65 - error TS2574: A rest element type must be an array type.

1985     export type Tail<L extends List> = L extends readonly [any, ...infer LTail] ? LTail : L;
                                                                     ~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:2255:9 - error TS1256: A rest element must be last in a tuple type.

2255         ...L,
             ~~~~

node_modules/ts-toolbelt/out/index.d.ts:6645:60 - error TS1256: A rest element must be last in a tuple type.

6645     export type Pop<L extends List> = L extends (readonly [...infer LBody, any] | readonly [...infer LBody, any?]) ? LBody : L;
                                                                ~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:6645:93 - error TS1256: A rest element must be last in a tuple type.

6645     export type Pop<L extends List> = L extends (readonly [...infer LBody, any] | readonly [...infer LBody, any?]) ? LBody : L;