Interesting Bugs and Patches

This file lists particularly interesting bugs or patches I've encountered.

These issues are in no way a criticism of the code quality of these projects, I just found them particularly intruiguing.

That Should Never Happen

I once got a segfault in a Rust program that did not use unsafe anywhere.

I once deleted a single closing paren in Emacs.

Security

I found a way of getting arbitrary code execution in Emacs just by using tab completion. This later became part of CVE-2024-53920 (see writeup by Eshel Yaron who found much more serious variants).

Crashing Mature Projects

I found a way of causing a segfault in git-diff (fixed in this git commit).

My suggest.el project uncovered a way of causing a segfault in Emacs.

I found a way of crashing Python's mock library when comparing values with long strings.