error[E0635]: unknown feature proc_macro_span_shrink

[stumbles]

Steps to reproduce:
List the minimal actions needed to reproduce the behaviour.

1. ... install rust-1.75.0
2. ... compile influxdb-2.7.5
3. ...

Expected behaviour:
compile without error

Actual behaviour:

Flux module is the main module {"modroot": "/root/go/pkg/mod/github.com/influxdata/flux@v0.194.5"}
Executing cargo build {"dir": "/root/go/pkg/mod/github.com/influxdata/flux@v0.194.5/libflux", "target": "x86_64-unknown-linux-gnu"}
warning: virtual workspace defaulting to resolver = "1" despite one or more workspace members being on edition 2021 which implies resolver = "2"
note: to keep the current resolver, specify workspace.resolver = "1" in the workspace root's manifest
note: to use the edition 2021 resolver, specify workspace.resolver = "2" in the workspace root's manifest
note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
Compiling proc-macro2 v1.0.56
error[E0422]: cannot find struct, variant or union type LineColumn in crate proc_macro
--> /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/src/wrapper.rs:475:33
|
475 | let proc_macro::LineColumn { line, column } = s.start();
| ^^^^^^^^^^ not found in proc_macro
|
help: consider importing this struct through its public re-export
|
1 + use crate::LineColumn;
|
help: if you import LineColumn, refer to it directly
|
475 - let proc_macro::LineColumn { line, column } = s.start();
475 + let LineColumn { line, column } = s.start();
|

error[E0422]: cannot find struct, variant or union type LineColumn in crate proc_macro
--> /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/src/wrapper.rs:489:33
|
489 | let proc_macro::LineColumn { line, column } = s.end();
| ^^^^^^^^^^ not found in proc_macro
|
help: consider importing this struct through its public re-export
|
1 + use crate::LineColumn;
|
help: if you import LineColumn, refer to it directly
|
489 - let proc_macro::LineColumn { line, column } = s.end();
489 + let LineColumn { line, column } = s.end();
|

error[E0635]: unknown feature proc_macro_span_shrink
--> /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/src/lib.rs:92:30
|
92 | feature(proc_macro_span, proc_macro_span_shrink)
| ^^^^^^^^^^^^^^^^^^^^^^

Some errors have detailed explanations: E0422, E0635.
For more information about an error, try rustc --explain E0422.
error: could not compile proc-macro2 (lib) due to 3 previous errors
Error installing library {"name": "flux", "error": "exit status 101"}
/usr/src/influxdb-2.7.5/scripts/pkg-config.sh: exit status 1
make: *** [GNUmakefile:84: bin/linux/influxd] Error 1

Using these variables;
export GOPROXY="https://proxy.golang.org"
export GOSUMDB="sum.golang.org"
export GOFLAGS="-trimpath -mod=readonly -modcacherw"
export LDFLAGS=""
export RUSTFLAGS='-A hidden_glob_reexports'

PATH="$(go env GOPATH)/bin:$PATH" make -j1 VERSION=$VERSION COMMIT=$COMMIT INFLUXDB_SHA=$COMMIT &&

[TimB87]

I get the same build failure from the last 2.7.11 tarball.

[mgattozzi]

This is an issue that's fixed with proc-macro 1.0.60+
rust-lang/rust#113152

It's a dependency that needs to be updated over in the flux repo:

flux/libflux/Cargo.lock

Lines 991 to 998 in d452b50

	[[package]]
	name = "proc-macro2"
	version = "1.0.56"
	source = "registry+https://github.com/rust-lang/crates.io-index"
	checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
	dependencies = [
	"unicode-ident",
	]

Note that the repo uses Rust 1.72.0 which is why the issue probably has not been experienced

flux/rust-toolchain.toml

Line 2 in d452b50

channel = "1.72"

[mgattozzi]

Since this is relevant to the flux repo I will transfer the issue there