error[E0599]: no method named `source_file` found for struct `proc_macro2::Span` in the current scope

[stevensanborn]

I kept getting this error ... idk why .

mac silicon
rust 1.86
avm 0.31.0

i tried all different installs

error[E0599]: no method named source_file found for struct proc_macro2::Span in the current scope
--> /Users/stevensanborn/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/anchor-syn-0.31.0/src/idl/defined.rs:499:66
|
499 | ...n::call_site().source_file().path();
| ^^^^^^^^^^^ method not found in Span

so what fixed it for em was

line 499 ... let source_path = proc_macro2::Span::call_site().file();

[Wzy-source]

same issue

[cryptopapi997]

Yep, you're correct. Opened a PR for it: #3663

[cryptopapi997]

Also, as a temporary workaround you can do

anchor build --no-idl

RUSTUP_TOOLCHAIN=nightly-2025-04-01 anchor idl build -o target/idl/YOUR_PROG_NAME.json -t target/types/YOUR_PROG_NAME.ts

(and replace YOUR_PROG_NAME with your program name)

[brendanjryan]

I am able to repro this not only on nightly but also on 1.85.0

[kingmanas]

Replace the line with this :

In defined.rs

Line 499

use this

let source_path = proc_macro2::Span::call_site().file();

instead of previous line :

let source_path = proc_macro2::Span::call_site().source_file();

[cryptopapi997]

I am able to repro this not only on nightly but also on 1.85.0

Yes, but this is still nightly because anchor uses nightly for compiling the idl (which is what's breaking here)

anchor/idl/src/build.rs

Line 144 in 649b9d6

.unwrap_or_else(|_| "+nightly".to_string());

. So the version that matters is not your stable version, but your installed nightly version.

[adama789]

Is there any way to disable nightly and only use stable version?

[adama789]

Also, as a temporary workaround you can do

anchor build --no-idl

RUSTUP_TOOLCHAIN=nightly-2025-04-01 anchor idl build -o target/idl/YOUR_PROG_NAME.json -t target/types/YOUR_PROG_NAME.ts

(and replace YOUR_PROG_NAME with your program name)

I tried this solution, however:

error[E0599]: no method named file found for reference &proc_macro::Span in the current scope
--> /home/cedro/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.95/src/wrapper.rs:465:36
|
465 | Span::Compiler(s) => s.file(),
| ^^^^ method not found in &Span

error[E0599]: no method named local_file found for reference &proc_macro::Span in the current scope
--> /home/cedro/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.95/src/wrapper.rs:473:36
|
473 | Span::Compiler(s) => s.local_file(),
| ^^^^^^^^^^ method not found in &Span

[cryptopapi997]

Make sure you're using proc-macro2 v0.1.94, not v0.1.95

[vtn]

When trying:

anchor idl build -o target/idl/hello-world.json -t target/types/hello-world.ts

I get

Error: Not in a program directory

[cryptopapi997]

Make sure you're inside your project directory