Fix Rust out of memory errors during compilation by disabling debug info or limiting parallel build jobs.
Increase the memory available to the Rust compiler by setting the RUSTFLAGS environment variable to disable debug info or limit parallel jobs.
export RUSTFLAGS="-C debuginfo=0"
cargo build
Alternatively, limit parallel compilation jobs to reduce peak memory usage:
export RUSTFLAGS="-C debuginfo=0"
export CARGO_BUILD_JOBS=1
cargo build
The compiler runs out of memory when trying to build your project, often because it is processing too much data or too many files at once. Reducing the amount of debug information or building fewer parts simultaneously lowers the memory demand. Think of it like clearing space on a crowded desk by removing unnecessary papers or working on one task at a time.