Could you file an issue about this with reproduction steps? My attempt to
reproduce this works fine.
go.mod
```
module example.com
go 1.24rc1
tool (
golang.org/x/tools/cmd/stringer
golang.org/x/tools/cmd/toolstash
)
require (
golang.org/x/mod v0.22.0 // indirect
golang.org/x/sync v0.10.0 // indirect
golang.org/x/tools v0.28.0 // indirect
)
```
$ go version # go binary is 1.23
go: downloading go1.24rc1 (linux/amd64)
go version go1.24rc1 linux/amd64
On Fri, Dec 20, 2024 at 5:11 PM cpu...@gmail.com <cpui...@gmail.com> wrote:
> I already did- that's the first error message:
>
> go: errors parsing go.mod:
> go.mod:206: unknown block type: tool
>
> It seems that the forward compatibility does not work when the go.mod
> contains new sections as it fails to parse _before_ the actual Go version
> selection happens?
>
> On Thursday, December 19, 2024 at 7:54:21 PM UTC+1 Alex Bozhenko wrote:
>
>> You missed go:
>> go 1.24rc1
>> toolchain go1.24rc1
>>
>>
>> Go toolchain names¶ <https://go.dev/doc/toolchain#name>
>>
>> The standard Go toolchains are named go*V* where *V* is a Go version
>> denoting a beta release, release candidate, or release. For example,
>> go1.21rc1 and...
>>
>> Once you build, you can verify which version was used:
>> go version ./your_binary
>> https://tip.golang.org/doc/toolchain#config
>> > If the toolchain line is omitted, the module or workspace is
>> considered to have an implicit toolchain go*V* line, where *V* is the Go
>> version from the go line.
>>
>> So you only need to use 'go 1.24rc1' line.
>>
>> On Thursday, December 19, 2024 at 4:30:40 AM UTC-8 cpu...@gmail.com
>> wrote:
>>
>>> I'm preparing our application for go1.24, including using the tools
>>> go.mod directive. I was expecting that I should be able to require rc1 as
>>> part of the build process. However, adding
>>>
>>> go 1.24rc1
>>> toolchain 1.24rc1
>>>
>>> lead to either
>>>
>>> unknown block type: tool
>>> invalid toolchain version '1.24rc1': must match format go1.23.0 or
>>> default
>>>
>>> https://go.dev/doc/modules/gomod-ref does not mention RC versions,
>>> while https://go.dev/doc/toolchain does.
>>>
>>> Can RC versions be required through go.mod?
>>>
>>> Thanks,
>>> Andi
>>>
>> --
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