error[E0512]: cannot transmute

[youngday]

Describe the bug

Compiling zenoh-c v0.10.1-rc (/ /build/_deps/zenohc-build/release)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> / /build/_deps/zenohc-src/src/lib.rs:80:26
|
80 | unsafe { std::mem::transmute::<$src_type, $dst_type>(self) }

To reproduce

when make , at zenoh-c, have an error above.

System info

amd x64 debian12

[youngday]

[  2%] Generating release/target/release/libzenohc.so, release/target/release/libzenohc.a
"RUSTFLAGS = $$RUSTFLAGS"
[  2%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/collections/vec.c.o
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[  2%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/config/bt.c.o
[  9%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/api/api.c.o
[  9%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/config/serial.c.o
[  9%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/collections/intmap.c.o
[ 11%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/collections/string.c.o
[ 13%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/deprecated/platform.c.o
"cargo +stable build --release --manifest-path=/home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-build/release/Cargo.toml --features=logger-autoinit --features=shared-memory"
[ 13%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/config/tcp.c.o
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[ 20%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/multicast/bt.c.o
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[ 22%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/unicast/serial.c.o
[ 25%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/link/unicast/udp.c.o
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[ 47%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/protocol/iobuf.c.o
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[ 50%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/protocol/ext.c.o(build.rs), cfg-if, memchr, once_cell, value-bag, unicode-ident, autocfg, ser...
[ 52%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/protocol/keyexpr.c.o
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[ 54%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/query.c.obuild.rs), cfg-if, memchr, once_cell, value-bag, unicode-ident, autocfg, ser...
   Compiling syn v1.0.109
[ 54%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/queryable.c.od.rs), memchr, once_cell, value-bag, unicode-ident, autocfg, serde(build...
[ 56%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/reply.c.o
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[ 59%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/rx.c.oo2(build.rs), memchr, once_cell, value-bag, spin, autocfg, serde(build.rs), fut...
[ 59%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/resource.c.o
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[ 61%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/session/subscription.c.o
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[ 63%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/common/lease.c.o, anyhow(build.rs), log, memchr, futures-core(build), value-bag, au...
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   Compiling ppv-lite86 v0.2.17
[ 65%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/common/rx.c.ors), anyhow(build.rs), log, memchr, ppv-lite86, syn(build), bytes, aut...
[ 65%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/common/tx.c.o
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[ 68%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/manager.c.obuild.rs), log, memchr, ppv-lite86, bytes, serde_json(build.rs), autocfg...
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   Compiling crossbeam-utils v0.8.16
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[ 72%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/multicast/rx.c.outils(build.rs), bytes, proc-macro2, serde_json(build.rs), libc, fu...
[ 72%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/multicast/transport.c.o
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[ 84%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/unicast/read.c.o
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[ 88%] Building C object _deps/zenohpico-build/CMakeFiles/zenohpico.dir/src/transport/unicast/tx.c.o
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   Compiling futures-lite v1.13.0
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   Compiling async-lock v2.8.0
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   Compiling lazy_static v1.4.0
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   Compiling rustix v0.37.25
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   Compiling futures-sink v0.3.28
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   Compiling async-io v1.13.0
   Compiling generic-array v0.14.7
   Compiling pin-utils v0.1.0
   Compiling linux-raw-sys v0.3.8
   Compiling zenoh-collections v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zeroize v1.6.0
   Compiling getrandom v0.2.10
   Compiling socket2 v0.5.6
   Compiling mio v0.8.11
   Compiling num_cpus v1.16.0
   Compiling rand_core v0.6.4
   Compiling rand_chacha v0.3.1
   Compiling socket2 v0.4.9
   Compiling async-channel v1.9.0
   Compiling allocator-api2 v0.2.16
   Compiling rand v0.8.5
   Compiling async-task v4.4.0
   Compiling ryu v1.0.15
   Compiling futures-channel v0.3.28
   Compiling atomic-waker v1.1.1
   Compiling humantime v2.1.0
   Compiling hashbrown v0.14.0
   Compiling futures-task v0.3.28
   Compiling blocking v1.3.1
   Compiling async-executor v1.5.1
   Compiling futures-util v0.3.28
   Compiling signal-hook v0.3.17
   Compiling const-oid v0.9.5
   Compiling ring v0.17.6
   Compiling signal-hook-registry v1.4.1
   Compiling hashbrown v0.13.2
   Compiling memoffset v0.6.5
   Compiling async-process v1.7.0
   Compiling rustls-pki-types v1.3.1
   Compiling dyn-clone v1.0.13
   Compiling unicode-xid v0.2.4
   Compiling option-ext v0.2.0
   Compiling dirs-sys v0.4.1
   Compiling const_format_proc_macros v0.2.31
   Compiling crypto-common v0.1.6
   Compiling token-cell v1.5.0
   Compiling zenoh-buffers v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling async-trait v0.1.73
   Compiling no-std-net v0.6.0
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   Compiling base64 v0.21.4
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   Compiling num-traits v0.2.16
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   Compiling quinn v0.10.2
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   Compiling uuid v1.4.1
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   Compiling zenoh-link-commons v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling os_str_bytes v6.6.1
   Compiling zenoh-macros v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling smallvec v1.11.0
   Compiling static_assertions v1.1.0
   Compiling twox-hash v1.6.3
   Compiling zenoh-link-tcp v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link-ws v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link-unixsock_stream v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link-udp v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link-tls v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link-quic v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling clap_lex v0.2.4
   Compiling sha3 v0.10.8
   Compiling anstyle-parse v0.2.1
   Compiling rustc_version v0.4.0
   Compiling pkcs1 v0.7.5
   Compiling aes v0.8.3
   Compiling hmac v0.12.1
   Compiling signature v2.1.0
   Compiling atty v0.2.14
   Compiling strsim v0.10.0
   Compiling cbindgen v0.24.5
   Compiling fastrand v2.0.1
   Compiling textwrap v0.16.1
   Compiling termcolor v1.4.1
   Compiling cache-padded v1.3.0
   Compiling anstyle-query v1.0.0
   Compiling colorchoice v1.0.0
   Compiling anstyle v1.0.6
   Compiling array-init v2.1.0
   Compiling git-version-macro v0.3.5
   Compiling ringbuffer-spsc v0.1.9
   Compiling clap v3.2.25
   Compiling anstream v0.6.12
   Compiling tempfile v3.10.1
   Compiling rsa v0.9.2
   Compiling zenoh-crypto v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-link v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling lz4_flex v0.11.1
   Compiling env_filter v0.1.0
   Compiling toml v0.5.11
   Compiling heck v0.4.1
   Compiling fixedbitset v0.4.2
   Compiling zenoh-plugin-trait v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling zenoh-transport v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
   Compiling petgraph v0.6.4
   Compiling env_logger v0.11.2
   Compiling git-version v0.3.5
   Compiling ordered-float v4.1.1
   Compiling stop-token v0.7.0
   Compiling fs2 v0.4.3
   Compiling vec_map v0.8.2
   Compiling bincode v1.3.3
   Compiling iana-time-zone v0.1.57
   Compiling is-terminal v0.4.9
   Compiling env_logger v0.10.2
   Compiling chrono v0.4.35
   Compiling zenoh-c v0.11.0-dev (/home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-build/release)
   Compiling zenoh-ext v0.11.0-dev (https://github.com/eclipse-zenoh/zenoh.git?branch=main#3a264558)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
  --> /home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-src/src/lib.rs:86:26
   |
86 |                 unsafe { std::mem::transmute::<$src_type, $dst_type>(self) }
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
  ::: /home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-src/src/get.rs:63:1
   |
63 | impl_guarded_transmute!(ReplyInner, z_owned_reply_t);
   | ---------------------------------------------------- in this macro invocation
   |
   = note: source type: `Option<zenoh::query::Reply>` (1920 bits)
   = note: target type: `get::z_owned_reply_t` (1792 bits)
   = note: this error originates in the macro `impl_guarded_transmute` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0512`.
error: could not compile `zenoh-c` (lib) due to 1 previous error
make[2]: *** [_deps/zenohc-build/CMakeFiles/cargo.dir/build.make:111: _deps/zenohc-build/release/target/release/libzenohc.so] Error 101
make[1]: *** [CMakeFiles/Makefile2:277: _deps/zenohc-build/CMakeFiles/cargo.dir/all] Error 2
make: *** [Makefile:166: all] Error 2
(base) youngday@192:~/prj-cpp/zenoh-cpp/build$ make -j10
[  2%] Generating release/target/release/libzenohc.so, release/target/release/libzenohc.a
[100%] Built target zenohpico
"RUSTFLAGS = $$RUSTFLAGS"
"cargo +stable build --release --manifest-path=/home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-build/release/Cargo.toml --features=logger-autoinit --features=shared-memory"
   Compiling zenoh-c v0.11.0-dev (/home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-build/release)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
  --> /home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-src/src/lib.rs:86:26
   |
86 |                 unsafe { std::mem::transmute::<$src_type, $dst_type>(self) }
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
  ::: /home/youngday/prj-cpp/zenoh-cpp/build/_deps/zenohc-src/src/get.rs:63:1
   |
63 | impl_guarded_transmute!(ReplyInner, z_owned_reply_t);
   | ---------------------------------------------------- in this macro invocation
   |
   = note: source type: `Option<zenoh::query::Reply>` (1920 bits)
   = note: target type: `get::z_owned_reply_t` (1792 bits)
   = note: this error originates in the macro `impl_guarded_transmute` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0512`.
error: could not compile `zenoh-c` (lib) due to 1 previous error
make[2]: *** [_deps/zenohc-build/CMakeFiles/cargo.dir/build.make:111: _deps/zenohc-build/release/target/release/libzenohc.so] Error 101
make[1]: *** [CMakeFiles/Makefile2:277: _deps/zenohc-build/CMakeFiles/cargo.dir/all] Error 2
make: *** [Makefile:166: all] Error 2

[Mallets]

See eclipse-zenoh/zenoh-c#295

[Mallets]

@youngday I assume are you compiling it with rust 1.77, am I correct?
Due to the latest changes introduced by rust 1.77, zenoh-0.10.10-rc does not compile anymore. Therefore, it is necessary to use a rust version <=1.76.

[youngday]

my compile env:debian 12 x64 ,amd, gcc 12
rustup default 1.76 and 1.75, not passed.
just compile zenoh-c 0.10.1

error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
  --> src/lib.rs:80:26
   |
80 |                 unsafe { std::mem::transmute::<$src_type, $dst_type>(self) }
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
  ::: src/get.rs:63:1
   |
63 | impl_guarded_transmute!(ReplyInner, z_owned_reply_t);
   | ---------------------------------------------------- in this macro invocation
   |
   = note: source type: `Option<zenoh::query::Reply>` (1920 bits)
   = note: target type: `get::z_owned_reply_t` (1792 bits)
   = note: this error originates in the macro `impl_guarded_transmute` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0512`.
error: could not compile `zenoh-c` (lib) due to 1 previous error
make[2]: *** [CMakeFiles/cargo.dir/build.make:105: /home/youngday/prj-rust/zenoh-c/target/release/libzenohc.so] Error 101
make[1]: *** [CMakeFiles/Makefile2:180: CMakeFiles/cargo.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

[youngday]

test ok ,zenoh-c 's git check point,

Fix alignment and layout for z_owned_reply_t 

align issues.

[youngday]

Thanks!, continue zenoh .

[Mallets]

You can also set the rust version to a specific one via cmake ../build -DZENOH_CARGO_CHANNEL=1.76.0.