BEGIN;CREATETYPEfooAS (xinteger);CREATEDOMAINbarAS fooNOT NULL;CREATETYPEfizzAS (y bar);CREATETABLEbuzz(z fizzNOT NULL);INSERT INTO buzzVALUES (ROW(ROW(1)));COMMIT;

#![expect(    clippy::trait_duplication_in_bounds,    reason ="can't fix since part of ToSql macro")]use core::{    net::{IpAddr,Ipv6Addr},    time::Duration,};use postgres_types::{FromSql,ToSql};use tokio::runtime::Builder;use tokio_postgres::{    config::{ChannelBinding,Config,LoadBalanceHosts,SslMode,TargetSessionAttrs},    tls::NoTls,IsolationLevel,};#[derive(Debug,FromSql,ToSql)]#[postgres(name ="foo")]structFoo{x:i32,}#[derive(FromSql)]#[postgres(name ="bar")]structBar(Foo);#[derive(FromSql)]#[postgres(name ="fizz")]structFizz{y:Bar,}fnmain(){Builder::new_current_thread().enable_all().build().unwrap().block_on(async{letmut config =Config::new();let c = config.application_name("bug").channel_binding(ChannelBinding::Disable).connect_timeout(Duration::from_secs(10)).dbname("example").host("").hostaddr(IpAddr::V6(Ipv6Addr::LOCALHOST)).keepalives(true).keepalives_idle(Duration::from_secs(300)).load_balance_hosts(LoadBalanceHosts::Disable).password(b"password").port(5432).ssl_mode(SslMode::Disable).target_session_attrs(TargetSessionAttrs::Any).user("example");let(mut client, con) = c.connect(NoTls).await.unwrap();            tokio::spawn(asyncmove{                con.await.unwrap();});let txn = client.build_transaction().isolation_level(IsolationLevel::Serializable).read_only(true).start().await.unwrap();let stmt = txn.prepare_typed("SELECT z FROM buzz;",[].as_slice()).await.unwrap();let row = txn.query_one(&stmt,&[]).await.unwrap();// The `panic` occurs on the below line.let col1 = row.get::<'_,_,Fizz>(0);println!("{}", col1.y.0.x);            txn.commit().await.unwrap();});}

[zack@laptop bug]$export RUST_BACKTRACE=full&& cargo run    Updating crates.io index     Locking 98 packages to latest compatible versions      Adding fallible-iterator v0.2.0 (latest: v0.3.0)      Adding generic-array v0.14.7 (latest: v1.1.0)      Adding hermit-abi v0.3.9 (latest: v0.4.0)      Adding siphasher v0.3.11 (latest: v1.0.1)      Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.3+wasi-0.2.2)      Adding windows-sys v0.52.0 (latest: v0.59.0)      Adding zerocopy v0.7.35 (latest: v0.8.10)      Adding zerocopy-derive v0.7.35 (latest: v0.8.10)   Compiling proc-macro2 v1.0.89   Compiling unicode-ident v1.0.13   Compiling libc v0.2.164   Compiling typenum v1.17.0   Compiling version_check v0.9.5   Compiling cfg-if v1.0.0   Compiling autocfg v1.4.0   Compiling byteorder v1.5.0   Compiling subtle v2.6.1   Compiling tinyvec_macros v0.1.1   Compiling bytes v1.8.0   Compiling unicode-bidi v0.3.17   Compiling unicode-properties v0.1.3   Compiling tinyvec v1.8.0   Compiling futures-sink v0.3.31   Compiling pin-project-lite v0.2.15   Compiling parking_lot_core v0.9.10   Compiling futures-core v0.3.31   Compiling cpufeatures v0.2.15   Compiling memchr v2.7.4   Compiling base64 v0.22.1   Compiling smallvec v1.13.2   Compiling generic-array v0.14.7   Compiling fallible-iterator v0.2.0   Compiling siphasher v0.3.11   Compiling slab v0.4.9   Compiling lock_api v0.4.12   Compiling heck v0.5.0   Compiling scopeguard v1.2.0   Compiling phf_shared v0.11.2   Compiling futures-task v0.3.31   Compiling quote v1.0.37   Compiling unicode-normalization v0.1.24   Compiling pin-utils v0.1.0   Compiling phf v0.11.2   Compiling futures-channel v0.3.31   Compiling log v0.4.22   Compiling whoami v1.5.2   Compiling getrandom v0.2.15   Compiling socket2 v0.5.7   Compiling mio v1.0.2   Compiling syn v2.0.87   Compiling rand_core v0.6.4   Compiling percent-encoding v2.3.1   Compiling tokio v1.41.1   Compiling parking_lot v0.12.3   Compiling stringprep v0.1.5   Compiling crypto-common v0.1.6   Compiling block-buffer v0.10.4   Compiling digest v0.10.7   Compiling md-5 v0.10.6   Compiling sha2 v0.10.8   Compiling hmac v0.12.1   Compiling zerocopy-derive v0.7.35   Compiling futures-macro v0.3.31   Compiling postgres-derive v0.4.6   Compiling async-trait v0.1.83   Compiling tokio-util v0.7.12   Compiling zerocopy v0.7.35   Compiling futures-util v0.3.31   Compiling ppv-lite86 v0.2.20   Compiling rand_chacha v0.3.1   Compiling rand v0.8.5   Compiling postgres-protocol v0.6.7   Compiling postgres-types v0.2.8   Compiling tokio-postgres v0.7.12   Compiling bug v0.1.0 (/home/zack/projects/bug)    Finished`dev` profile [unoptimized + debuginfo] target(s)in 6.81s     Running`target/debug/bug`thread'main' panicked at src/main.rs:16:17:internal error: entered unreachable codestack backtrace:   0:     0x5b8541de129a - std::backtrace_rs::backtrace::libunwind::trace::h99efb0985cae5d78                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5   1:     0x5b8541de129a - std::backtrace_rs::backtrace::trace_unsynchronized::he2c1aa63b3f7fad8                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5   2:     0x5b8541de129a - std::sys::backtrace::_print_fmt::h8a221d40f5e0f88b                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:66:9   3:     0x5b8541de129a -<std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h304520fd6a30aa07                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:39:26   4:     0x5b8541e00cfb - core::fmt::rt::Argument::fmt::h5da9c218ec984eaf                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/fmt/rt.rs:177:76   5:     0x5b8541e00cfb - core::fmt::write::hf5713710ce10ff22                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/fmt/mod.rs:1178:21   6:     0x5b8541dde1f3 - std::io::Write::write_fmt::hda708db57927dacf                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/io/mod.rs:1823:15   7:     0x5b8541de2442 - std::sys::backtrace::BacktraceLock::print::hbcdbec4d97c91528                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:42:9   8:     0x5b8541de2442 - std::panicking::default_hook::{{closure}}::he1ad87607d0c11c5                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:266:22   9:     0x5b8541de20ae - std::panicking::default_hook::h81c8cd2e7c59ee33                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:293:9  10:     0x5b8541de2ccf - std::panicking::rust_panic_with_hook::had2118629c312a4a                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:797:13  11:     0x5b8541de2983 - std::panicking::begin_panic_handler::{{closure}}::h7fa5985d111bafa2                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:664:13  12:     0x5b8541de1779 - std::sys::backtrace::__rust_end_short_backtrace::h704d151dbefa09c5                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:170:18  13:     0x5b8541de2644 - rust_begin_unwind                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:662:5  14:     0x5b8541c24ba3 - core::panicking::panic_fmt::h3eea515d05f7a35e                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/panicking.rs:74:14  15:     0x5b8541c24c2c - core::panicking::panic::h102d65dbfa674afe                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/panicking.rs:148:5  16:     0x5b8541c65f92 -<bug::Foo as postgres_types::FromSql>::from_sql::h43e1abeab9a3c013                               at /home/zack/projects/bug/src/main.rs:16:17  17:     0x5b8541c66626 -<bug::Bar as postgres_types::FromSql>::from_sql::h3bf354d1b63b138d                               at /home/zack/projects/bug/src/main.rs:21:17  18:     0x5b8541c49be0 - postgres_types::FromSql::from_sql_nullable::heb890c98a7575749                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/postgres-types-0.2.8/src/lib.rs:553:26  19:     0x5b8541c3a5b6 - postgres_types::private::read_value::h60ed5086d229f1fd                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/postgres-types-0.2.8/src/private.rs:33:5  20:     0x5b8541c66c04 -<bug::Fizz as postgres_types::FromSql>::from_sql::hd1e47626297d0f67                               at /home/zack/projects/bug/src/main.rs:24:17  21:     0x5b8541c49b60 - postgres_types::FromSql::from_sql_nullable::h8b6560ee4998bc3c                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/postgres-types-0.2.8/src/lib.rs:553:26  22:     0x5b8541c3ff59 - tokio_postgres::row::Row::get_inner::hbdb55d077f4a2675                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-postgres-0.7.12/src/row.rs:184:9  23:     0x5b8541c3fb8e - tokio_postgres::row::Row::get::h51f09083614dfe15                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-postgres-0.7.12/src/row.rs:151:15  24:     0x5b8541c4ac65 - bug::main::{{closure}}::hec6cf66abc2b37c0                               at /home/zack/projects/bug/src/main.rs:67:24  25:     0x5b8541c3a1fd -<core::pin::Pin<P> as core::future::future::Future>::poll::h5b0901c32bd73ba6                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/future/future.rs:123:9  26:     0x5b8541c3a2bd -<core::pin::Pin<P> as core::future::future::Future>::poll::hcf178ea35cd368f9                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/future/future.rs:123:9  27:     0x5b8541c34bff - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::{{closure}}::h5c8ff6977dfd5361                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:729:57  28:     0x5b8541c34b25 - tokio::runtime::coop::with_budget::h79f7fee45e1fa95c                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/coop.rs:107:5  29:     0x5b8541c34b25 - tokio::runtime::coop::budget::ha98b8bca93bacaa2                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/coop.rs:73:5  30:     0x5b8541c34b25 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::h1c41bed8d6c2e705                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:729:25  31:     0x5b8541c324b0 - tokio::runtime::scheduler::current_thread::Context::enter::h75f2cabd0440a202                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:428:19  32:     0x5b8541c3420b - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::hd312ed3b2fc5c4b0                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:728:36  33:     0x5b8541c336a4 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::{{closure}}::hfcbec99e2427c975                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:807:68  34:     0x5b8541c66f9b - tokio::runtime::context::scoped::Scoped<T>::set::hfd7dc621c1a86dd6                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/context/scoped.rs:40:9  35:     0x5b8541c3e469 - tokio::runtime::context::set_scheduler::{{closure}}::he0284573d5eb0ca5                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/context.rs:180:26  36:     0x5b8541c5c65a - std::thread::local::LocalKey<T>::try_with::h705fa3e9e86b8046                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/thread/local.rs:283:12  37:     0x5b8541c5bc2a - std::thread::local::LocalKey<T>::with::hcbecfc679dd67832                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/thread/local.rs:260:9  38:     0x5b8541c3e3dd - tokio::runtime::context::set_scheduler::hac0d58a5dc54ad36                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/context.rs:180:9  39:     0x5b8541c33430 - tokio::runtime::scheduler::current_thread::CoreGuard::enter::h1e18d6ebd2188d54                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:807:27  40:     0x5b8541c33723 - tokio::runtime::scheduler::current_thread::CoreGuard::block_on::hf8078cbf5b28f26c                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:716:19  41:     0x5b8541c30efd - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::{{closure}}::ha66859ddb7d9bad0                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:196:28  42:     0x5b8541c2a527 - tokio::runtime::context::runtime::enter_runtime::hae321f8f5ba61d93                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/context/runtime.rs:65:16  43:     0x5b8541c30bd3 - tokio::runtime::scheduler::current_thread::CurrentThread::block_on::h14c83c76c10473e3                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/scheduler/current_thread/mod.rs:184:9  44:     0x5b8541c2ab10 - tokio::runtime::runtime::Runtime::block_on_inner::h28918626ddecdeee                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/runtime.rs:368:47  45:     0x5b8541c2aefe - tokio::runtime::runtime::Runtime::block_on::h751fbbf92aa61924                               at /home/zack/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.41.1/src/runtime/runtime.rs:340:13  46:     0x5b8541c65e4c - bug::main::ha7253ccdcb8d6d35                               at /home/zack/projects/bug/src/main.rs:30:5  47:     0x5b8541c25b4b - core::ops::function::FnOnce::call_once::h9f3bb0ebd6d37fd7                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/ops/function.rs:250:5  48:     0x5b8541c5cd7e - std::sys::backtrace::__rust_begin_short_backtrace::h0b49c9502cd6f287                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:154:18  49:     0x5b8541c2a081 - std::rt::lang_start::{{closure}}::hc1d9acf0009135ce                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:164:18  50:     0x5b8541ddae40 - core::ops::function::impls::<impl core::ops::function::FnOnce<A>for&F>::call_once::h08ecba131ab90ec4                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/ops/function.rs:284:13  51:     0x5b8541ddae40 - std::panicking::try::do_call::hf33a59fd8ce953f4                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40  52:     0x5b8541ddae40 - std::panicking::try::h5005ce80ce949fd8                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19  53:     0x5b8541ddae40 - std::panic::catch_unwind::hfbae19e2e2c5b7ed                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14  54:     0x5b8541ddae40 - std::rt::lang_start_internal::{{closure}}::ha0331c3690741813                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:48  55:     0x5b8541ddae40 - std::panicking::try::do_call::hcdcbdb616b4d0295                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40  56:     0x5b8541ddae40 - std::panicking::try::h3f2f1725a07d2256                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19  57:     0x5b8541ddae40 - std::panic::catch_unwind::h51869e04b56b2dc3                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14  58:     0x5b8541ddae40 - std::rt::lang_start_internal::h4d90db0530245041                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:20  59:     0x5b8541c2a05a - std::rt::lang_start::h0c5b3abe1e928f3c                               at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:163:17  60:     0x5b8541c66d8e - main  61:     0x747cf2318e08 -<unknown>  62:     0x747cf2318ecc - __libc_start_main  63:     0x5b8541c255f5 - _start  64:                0x0 -<unknown>

[zack@laptop bug]$ cat Cargo.toml[package]name ="bug"version ="0.1.0"edition ="2021"[dependencies]postgres-types = { version ="0.2.8", default-features = false, features = ["derive"] }tokio = { version ="1.41.1", default-features = false, features = ["rt"] }tokio-postgres = { version ="0.7.12", default-features = false, features = ["runtime"] }[zack@laptop bug]$ rustc --versionrustc 1.82.0 (f6e511eec 2024-10-15)[zack@laptop bug]$ postgres --versionpostgres (PostgreSQL) 16.3[zack@laptop bug]$ uname -aLinux laptop 6.11.7-arch1-1#1 SMP PREEMPT_DYNAMIC Fri, 08 Nov 2024 17:57:56 +0000 x86_64 GNU/Linux