cannot compile code with function pointer

[chungwong]

It looks like function pointers are not support at this moment.

fn add_one(x: i32) -> i32 {
    x + 1
}

fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
    f(arg) + f(arg)
}

fn main() {
    let answer = do_twice(add_one, 5);

    println!("The answer is: {}", answer);
}

Checking aquascope_tmp_proj v0.1.0 (/app/aquascope_tmp_proj)

Running
 
`CARGO=/usr/local/rustup/toolchains/nightly-2023-04-12-x86_64-unknown-linux-musl/bin/cargo CARGO_BIN_NAME=aquascope_tmp_proj CARGO_CRATE_NAME=aquascope_tmp_proj CARGO_MANIFEST_DIR=/app/aquascope_tmp_proj CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=aquascope_tmp_proj CARGO_PKG_README='' CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps:/root/.cache/miri/lib:/usr/local/rustup/toolchains/nightly-2023-04-12-x86_64-unknown-linux-musl/lib' /usr/local/cargo/bin/aquascope-driver rustc --crate-name aquascope_tmp_proj --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 -C metadata=3455252d1c09473c -C extra-filename=-3455252d1c09473c --out-dir /app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps -C incremental=/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/incremental -L dependency=/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps -C target-feature=-crt-static`


thread 'rustc' panicked at '`ref_to_mplace` called on non-ptr type', /rustc/9df3a39fb30575d808e70800f9fad5362aac57a2/compiler/rustc_const_eval/src/interpret/place.rs:321:47
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: could not compile `aquascope_tmp_proj` (bin "aquascope_tmp_proj")

Caused by:
  process didn't exit successfully: `CARGO=/usr/local/rustup/toolchains/nightly-2023-04-12-x86_64-unknown-linux-musl/bin/cargo CARGO_BIN_NAME=aquascope_tmp_proj CARGO_CRATE_NAME=aquascope_tmp_proj CARGO_MANIFEST_DIR=/app/aquascope_tmp_proj CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=aquascope_tmp_proj CARGO_PKG_README='' CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps:/root/.cache/miri/lib:/usr/local/rustup/toolchains/nightly-2023-04-12-x86_64-unknown-linux-musl/lib' /usr/local/cargo/bin/aquascope-driver rustc --crate-name aquascope_tmp_proj --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 -C metadata=3455252d1c09473c -C extra-filename=-3455252d1c09473c --out-dir /app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps -C incremental=/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/incremental -L dependency=/app/aquascope_tmp_proj/target/plugin-nightly-2023-04-12/debug/deps -C target-feature=-crt-static` (exit status: 101)