create an issue to cargo

[dj8yfo]

as mentioned in #289 (comment), one should create an issue to cargo with a minimal reproducer

about

RUSTFLAGS="-Awarnings" cargo build --target wasm32-unknown-unknown

resulting in a cryptic error, while rustc actually runs the command suggested as reason of failure without errors

cat src/lib.rs | rustc - --crate-name ___ --print=file-names -Awarnings --target wasm32-unknown-unknown --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg

[dj8yfo]

CARGO_ENCODED_RUSTFLAGS="-Awarnings" cargo build --target wasm32-unknown-unknown is similar error

both of

RUSTFLAGS="-Awarnings" cargo build
CARGO_ENCODED_RUSTFLAGS="-Awarnings" cargo build

are fine