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Jan 29, 2017 at 17:06
TIL that making an ABI mistake can cause segfaults in Rust, without unsafe or warnings!
tuple structs cause FFI segfaults on 32-bit Linux · Issue #39394 · rust-lang/rust
tuple structs cause FFI segfaults on 32-bit Linux · Issue #39394 · rust-lang/rust
Given the following Rust code, compiled as a staticlib: extern crate libc; #[repr(C)] pub struct LispObject(libc::c_int); #[no_mangle] pub extern "C" fn fcdr(list: LispObject) -> LispObject { print...

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Jan 25, 2021 at 02:12
1
Normally I don't like segfaults: they usually mean something low in the stack is broken and it'll be a pain to debug. Writing assembly, segfaults are a good thing! They're a well-defined error state, whilst there are a whole range of messy failure states that are worse.
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Guile Emacs is a real challenge to build. There's lots of helpful advice on the wiki, but compiles are slow and prove to segfaults.
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