Alpine issues with dns-lookup 2 about dns-lookup HOT 5 CLOSED

Ah now I have this in a test system I see the issue. I'll push a new release with this fix.

Thanks for the bug report.

from dns-lookup.

Thanks for the bug report.

What architecture are you running on? And what libc are you using, glibc? (If you don't know give me the output of "rustc --version --verbose").

The only changes made in version 2.0 was an upgrade of socket2 to the next minor version (0.5.X), a swap to windows-sys on the windows platform, and an update so lookup_addr will error instead of returning empty string when a reverse ptr record does not exist. Only the change to socket2 sounds relevant here.

As a test, could you try running this code on alpine to rule out any ignored errors?

fn main() {
    println!("before");
    println!("{:?}", dns_lookup::lookup_host("127.0.0.1"));
    println!("after");
}

If none of that helps there are some tracing tools that may help, but we need more info first.

from dns-lookup.

Thanks for the quick response!

Alpine uses musl instead of glibc, and my architecture is x86_64. Here is more detailed output.

$ docker run -it --rm foo-debian rustc --version --verbose
rustc 1.69.0 (84c898d65 2023-04-16)
binary: rustc
commit-hash: 84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc
commit-date: 2023-04-16
host: x86_64-unknown-linux-gnu
release: 1.69.0
LLVM version: 15.0.7
$ docker run -it --rm foo-alpine rustc --version --verbose
rustc 1.69.0 (84c898d65 2023-04-16)
binary: rustc
commit-hash: 84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc
commit-date: 2023-04-16
host: x86_64-unknown-linux-musl
release: 1.69.0
LLVM version: 15.0.7

Here's the output after the code modifications.

$ docker run -it --rm foo-debian
before
Ok([127.0.0.1])
after
$ docker run -it --rm foo-alpine
before

from dns-lookup.

Okay if musl is potentially causing the issue I can do some more involved testing of this next week. I'll get out a debugger and try to trace the call graph to find what's killing the code.

I just pushed a commit fixing a few compile errors on aarch64. I doubt they'll fix this issue, but if you have some time I'd appreciate if you could test.

from dns-lookup.

Unfortunately, it didn't help. I get the same result as before with the following Cargo.toml.

[package]
name = "foo"
version = "0.1.0"
edition = "2018"

[dependencies]
dns-lookup = { git = "https://github.com/keeperofdakeys/dns-lookup.git", rev = "ea577e2", default-features = false }

Have you checked if you can replicate the issue locally with Docker? I'm happy to help, but I posted all the files that should be necessary if you want a quicker process.

from dns-lookup.