Incorrectly emitted error TS1149: File name differs from already included file name only in casing

[alespergl]

TypeScript Version: 3.8.3

Search Terms:
forceConsistentCasingInFileNames, TS1149

Code
index.ts

/// <reference types="./foo" />
/// <reference types="./Bar" />

foo.d.ts

// empty

Bar.d.ts

// empty

tsconfig.json

{
    "compilerOptions": {
        "forceConsistentCasingInFileNames": true
    }
}

Expected behavior:
Clean compile.

Actual behavior:

index.ts:2:23 - error TS1149: File name '/.../bar.d.ts' differs from already included file name '/.../Bar.d.ts' only in casing.

2 /// <reference types="./Bar" />
                        ~~~~~


Found 1 error.

Playground Link:

Related Issues:
#25460

[sheetalkamat]

This is because types are always lower case #10340
@RyanCavanaugh and @DanielRosenwasser to weigh in on this but this was intended behavior

[DanielRosenwasser]

Uh, I didn't even realize that types could get relative paths, but since they do I think maybe they should not automatically lowercase. I'd wait for Ryan on input here.

[sheetalkamat]

But its not just the path that's the issue. its the type itself being referred to as Bar and will become bar

[typescript-bot]

This issue has been marked 'Working as Intended' and has seen no recent activity. It has been automatically closed for house-keeping purposes.

[kodekage]

How can one resolve the compilation error?

[mrfambo]

Solution: tsconfig.json
"forceConsistentCasingInFileNames": false.