Temporarily disable panic = "abort" in hello-world-small.

README.md

@@ -166,6 +166,11 @@ Hello, world!
 
 ## Compatibility with `-Zbuild-std`
 
+At this time, a combination of Eyra, `-Zbuild-std`, and `panic = "abort"` does
+not work. See [nbdd0121/unwinding#39] for details. FIXME.
+
+[nbdd0121/unwinding#39]: https://github.com/nbdd0121/unwinding/issues/39
+
 Eyra works with `-Zbuild-std`, however the `--rename=std` trick used above
 doesn't work, so it's necessary to instead use this `cargo add` invocation:
 

example-crates/hello-world-small/Cargo.toml

@@ -13,7 +13,9 @@ strip = true  # Automatically strip symbols from the binary.
 opt-level = "z"  # Optimize for size.
 lto = true
 codegen-units = 1
-panic = "abort"
+# FIXME: `panic = "abort"` does not currently work with `-Zbuild-std` due
+# to <https://github.com/nbdd0121/unwinding/issues/39>.
+#panic = "abort"
 
 # This is just an example crate, and not part of the eyra workspace.
 [workspace]