Fable library: TimeSpan.FromSeconds and .NET9

[zelenij]

Description

.NET9 added a new overload for the TimeSpan.FromSeconds which expects int64. This overload is missing from the library implementation. However, fable client code compilation doesn't fail. However, during runtime this message is generated by JS:

TypeError: can't convert BigInt to number

Repro code

TimeSpan.FromSeconds 1L

Expected and actual results

Expected: execute correctly

Actual: a JS exception is thrown

Related information

• Fable version: 4.24.0
• Operating system: MacOs, Linux

[MangelMaxime]

After lookin into this issue, it seems like they added a bunch of new overload, working on a fix for them.