Build fails: error[E0433]: failed to resolve: use of undeclared crate or module alloc

[yurivict]

Describe the bug

     Running `CARGO=/usr/local/bin/cargo CARGO_CFG_PANIC=unwind CARGO_CFG_TARGET_ARCH=x86_64 CARGO_CFG_TARGET_ENDIAN=little CARGO_CFG_TARGET_ENV='' CARGO_CFG_TARGET_FAMILY=unix CARGO_CFG_TARGET_FEATURE=fxsr,sse,sse2 CARGO_CFG_TARGET_HAS_ATOMIC=16,32,64,8,ptr CARGO_CFG_TARGET_OS=freebsd CARGO_CFG_TARGET_POINTER_WIDTH=64 CARGO_CFG_TARGET_VENDOR=unknown CARGO_CFG_UNIX='' CARGO_ENCODED_RUSTFLAGS='-Clink-arg=-fstack-protector-strong' CARGO_FEATURE_DEFAULT=1 CARGO_FEATURE_STD=1 CARGO_MANIFEST_DIR=/wrkdirs/usr/ports/devel/tabby/work/tabby-0.9.1/cargo-crates/smartstring-1.0.1 CARGO_PKG_AUTHORS='Bodil Stokke <bodil@bodil.org>' CARGO_PKG_DESCRIPTION='Compact inlined strings' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=MPL-2.0+ CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=smartstring CARGO_PKG_README=./README.md CARGO_PKG_REPOSITORY='https://github.com/bodil/smartstring' CARGO_PKG_RUST_VERSION=1.57 CARGO_PKG_VERSION=1.0.1 CARGO_PKG_VERSION_MAJOR=1 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=1 CARGO_PKG_VERSION_PRE='' DEBUG=false HOST=x86_64-unknown-freebsd LD_LIBRARY_PATH='/wrkdirs/usr/ports/devel/tabby/work/target/release/deps:/wrkdirs/usr/ports/devel/tabby/work/target/release:/usr/local/lib/rustlib/x86_64-unknown-freebsd/lib' NUM_JOBS=6 OPT_LEVEL=2 OUT_DIR=/wrkdirs/usr/ports/devel/tabby/work/target/x86_64-unknown-freebsd/release/build/smartstring-198a2c88d2dc1965/out PROFILE=release RUSTC=/usr/local/bin/rustc RUSTC_LINKER=cc RUSTDOC=/usr/local/bin/rustdoc TARGET=x86_64-unknown-freebsd /wrkdirs/usr/ports/devel/tabby/work/target/release/build/smartstring-75fb01878bd660fb/build-script-build`
[smartstring 1.0.1] error[E0433]: failed to resolve: use of undeclared crate or module `alloc`
[smartstring 1.0.1]  --> <anon>:1:18
[smartstring 1.0.1]   |
[smartstring 1.0.1] 1 | pub trait Probe: alloc::alloc::Allocator + Sized {}
[smartstring 1.0.1]   |                  ^^^^^ use of undeclared crate or module `alloc`
[smartstring 1.0.1]   |
[smartstring 1.0.1]   = help: add `extern crate alloc` to use the `alloc` crate
[smartstring 1.0.1] help: consider importing this module
[smartstring 1.0.1]   |
[smartstring 1.0.1] 1 + use std::alloc;
[smartstring 1.0.1]   |
[smartstring 1.0.1] help: if you import `alloc`, refer to it directly
[smartstring 1.0.1]   |
[smartstring 1.0.1] 1 - pub trait Probe: alloc::alloc::Allocator + Sized {}
[smartstring 1.0.1] 1 + pub trait Probe: alloc::Allocator + Sized {}
[smartstring 1.0.1]   |                  
[smartstring 1.0.1]   
[smartstring 1.0.1] error: aborting due to 1 previous error
[smartstring 1.0.1] 

Information about your version

tabby-0.9.1
rust-1.76.0

[wsxiaoys]

Hey - could you share the commit hash you used to run cargo build?

[yurivict]

It uses the v0.9.1 tag.