Call parameter type does not match function signature (with LTO enabled)

[BurntSushi]

This seems to be an LTO related bug that the benchmarks game maintainer has come across from this page: https://alioth.debian.org/tracker/index.php?func=detail&aid=315089&group_id=100815&atid=413122 (ctrl-f for "Call parameter type"). Specifically, these are the steps:

$ cargo new regex-deps
$ printf '[dependencies]\nregex = "=0.1.38"\n' >> regex-deps/Cargo.toml
$ cargo build --release --manifest-path regex-deps/Cargo.toml
Updating registry `https://github.com/rust-lang/crates.io-index`
Compiling regex-syntax v0.1.2
Compiling libc v0.1.8
Compiling memchr v0.1.3
Compiling aho-corasick v0.2.1
Compiling regex v0.1.38
Compiling regex-deps v0.1.0 (file:///testzone/regex-deps)
$ rustc -C opt-level=3 -C lto -L ./regex-deps/target/release/deps/ regex-dna.rs -o regex-dna
Call parameter type does not match function signature!
Illegal instruction (core dumped)

rustc version: rustc 1.0.0 (a59de37e9 2015-05-13) (built 2015-05-14)

If -C lto is removed from the final rustc command, then compilation succeeds.

I am not able to reproduce this myself, and I suspect there probably isn't enough info here for this to be a helpful bug report. But I'm reporting it anyway in case anyone knows something.

[BurntSushi]

Here's another data point (from the linked thread):

dunham@x86:~/Documents/testzone$ cargo new --verbose regex-deps
dunham@x86:~/Documents/testzone$ printf '[dependencies]\nregex = "=0.1.38"\n' >> regex-deps/Cargo.toml
dunham@x86:~/Documents/testzone$ cargo build --verbose --release --manifest-path regex-deps/Cargo.toml
Updating registry `https://github.com/rust-lang/crates.io-index`
Compiling libc v0.1.8
Running `rustc /home/dunham/.cargo/registry/src/github.com-1285ae84e5963aae/libc-0.1.8/rust/src/liblibc/lib.rs --crate-name libc --crate-type lib -C opt-level=3 --cfg feature="cargo-build" --cfg feature="default" -C metadata=38eabbf337f9ec62 -C extra-filename=-38eabbf337f9ec62 --out-dir /home/dunham/Documents/testzone/regex-deps/target/release/deps --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -Awarnings`
Compiling regex-syntax v0.1.2
Running `rustc /home/dunham/.cargo/registry/src/github.com-1285ae84e5963aae/regex-syntax-0.1.2/src/lib.rs --crate-name regex_syntax --crate-type lib -C opt-level=3 -C metadata=be48a5d99c29d3c3 -C extra-filename=-be48a5d99c29d3c3 --out-dir /home/dunham/Documents/testzone/regex-deps/target/release/deps --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -Awarnings`
Compiling memchr v0.1.3
Running `rustc /home/dunham/.cargo/registry/src/github.com-1285ae84e5963aae/memchr-0.1.3/src/lib.rs --crate-name memchr --crate-type lib -C opt-level=3 -C metadata=402ca7c396253b4c -C extra-filename=-402ca7c396253b4c --out-dir /home/dunham/Documents/testzone/regex-deps/target/release/deps --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps --extern libc=/home/dunham/Documents/testzone/regex-deps/target/release/deps/liblibc-38eabbf337f9ec62.rlib -Awarnings`
Compiling aho-corasick v0.2.1
Running `rustc /home/dunham/.cargo/registry/src/github.com-1285ae84e5963aae/aho-corasick-0.2.1/src/lib.rs --crate-name aho_corasick --crate-type lib -C opt-level=3 -C metadata=643dfbfe7b0f3f89 -C extra-filename=-643dfbfe7b0f3f89 --out-dir /home/dunham/Documents/testzone/regex-deps/target/release/deps --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps --extern memchr=/home/dunham/Documents/testzone/regex-deps/target/release/deps/libmemchr-402ca7c396253b4c.rlib -Awarnings`
Compiling regex v0.1.38
Running `rustc /home/dunham/.cargo/registry/src/github.com-1285ae84e5963aae/regex-0.1.38/src/lib.rs --crate-name regex --crate-type lib -C opt-level=3 -C metadata=24aef2815b09a635 -C extra-filename=-24aef2815b09a635 --out-dir /home/dunham/Documents/testzone/regex-deps/target/release/deps --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps --extern memchr=/home/dunham/Documents/testzone/regex-deps/target/release/deps/libmemchr-402ca7c396253b4c.rlib --extern regex_syntax=/home/dunham/Documents/testzone/regex-deps/target/release/deps/libregex_syntax-be48a5d99c29d3c3.rlib --extern aho_corasick=/home/dunham/Documents/testzone/regex-deps/target/release/deps/libaho_corasick-643dfbfe7b0f3f89.rlib -Awarnings`
Compiling regex-deps v0.1.0 (file:///home/dunham/Documents/testzone/regex-deps)
Running `rustc regex-deps/src/lib.rs --crate-name regex_deps --crate-type lib -C opt-level=3 --out-dir /home/dunham/Documents/testzone/regex-deps/target/release --emit=dep-info,link -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release -L dependency=/home/dunham/Documents/testzone/regex-deps/target/release/deps --extern regex=/home/dunham/Documents/testzone/regex-deps/target/release/deps/libregex-24aef2815b09a635.rlib`
dunham@x86:~/Documents/testzone$ rustc -C opt-level=3 -C lto -L ./regex-deps/target/release/deps/ regex-dna.rs -o regex-dna
Call parameter type does not match function signature!
Illegal instruction (core dumped)

[steveklabnik]

Triage:

I am not able to reproduce this myself, and I suspect there probably isn't enough info here for this to be a helpful bug report. But I'm reporting it anyway in case anyone knows something.

No other comments in almost two years, so I'm gonna give this a close.