Not sure if it has its place here, but it seems to...

# eap

[Joffrey]

Not sure if it has its place here, but it seems to be a bug with 1.7.20-Beta, so I'm writing here.

Trying to play with context receivers, I am defining the following function:

fun <C1, C2, R> withBoth(c1: C1, c2: C2, block: context(C1, C2) () -> R): R = block(c1, c2)

And I get this compiler error:

Subtyping relation between context receivers is prohibited

Is this a bug, or did I mess up the syntax somewhere? There is no subtyping intended anywhere here.

Note that moving C2 as a regular receiver fixes the compilation:

fun <C1, C2, R> withBoth(c1: C1, c2: C2, block: context(C1) C2.() -> R): R = block(c1, c2)

[Joffrey]

Some more context: I'm replying to this stackoverflow question. And I found what seemed like a bug when trying to call withBoth (defined with 2 context receivers) with a lambda (in 1.7.10). It works fine when passing a method reference as the block. Since it is pretty similar to https://youtrack.jetbrains.com/issue/KT-51243, and that one is supposedly fixed in 1.7.20, I wanted to try my luck with 1.7.20-Beta to see if it worked fine.

[Youssef Shoaib [MOD]]

You can suppress that error btw. The subtyping relationship error is so broken that I automatically just suppress it in every file where I define context functions lol

[Balazs Toth]

@Youssef Shoaib [MOD] How can you suppress it? I can't find the correct string for it

[Youssef Shoaib [MOD]]

@Suppress("SUBTYPING_BETWEEN_CONTEXT_RECEIVERS")

[Balazs Toth]

Thank you 🙂