Unable to use std::chrono clocks via Cxx interop

[karwa]

Description

Compiler complains that the result of .now() is ambiguous without a type annotation. It shouldn't be ambiguous, and I was unable to find any incantation which would satisfy the compiler.

Reproduction

import CxxStdlib

let n = std.chrono.steady_clock.now()
//      ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
// <source>:3:33: error: type of expression is ambiguous without a type annotation

(Build with -cxx-interoperability-mode=default)

Even with a type annotation:

let n: std.chrono.steady_clock.time_point = std.chrono.steady_clock.now()
//                                          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
// <source>:3:69: error: type of expression is ambiguous without a type annotation

It knows what the underlying type of steady_clock.time_point is, though:

Expected behavior

Expect it to work, even without a type annotation.

Environment

Swift version 5.10-dev (LLVM 5dc9d563e5a6cd2, Swift 9bfe759)
Target: x86_64-unknown-linux-gnu

Additional information

Godbolt