STR (on Linux):

1. Create hey.rs file that has generics usage (wget https://raw.githubusercontent.com/yurydelendik/old-man-sandbox/master/rust-wasm-hey/hey.rs)
2. Compile code rustc +nightly hey.rs --crate-type=cdylib -g -o hey
3. Dump DWARF info llvm-dwarfdump hey -debug-info -debug-line > hey.txt

Notice that hey.txt contains such entries as DW_AT_decl_file ("/home/yury/liballoc/vec.rs"), possibly produced by the fact that "liballoc/vec.rs" is a relative path and DW_AT_comp_dir is set to "/home/yury".

It is expected for core files to have absolute path e.g. "/rustc/20dc0c50704ba1fc8c56a88ae2bf05ddb3e419bc/src/liballoc/raw_vec.rs"