Release Aether 0.463.0 · aether-lang-dev/aether

What's new in 0.463.0

Actor ? ask answered 0 and leaked a 5s timeout when the handler used
reply <expression> (#1324). reply count parsed but codegen silently
dropped it (an ERROR comment in the generated C), so the ask waited out its
timeout and read 0; the fallback also cast the reply pointer to intptr_t,
emitting a -Wformat warning. reply <expression> is now a first-class
scalar reply: the handler sends a typed copy through the reply slot, the ask
site derefs it as that type (int, long, float, bool, ptr, string), and the
GCC statement-expression path now matches the MSVC helper's deref semantics.
An unknown message name in reply Name { ... } is a compile error instead of
silently generated nothing. Regression:
tests/regression/test_ask_scalar_reply.ae.
Heap-producing calls in bare print/println argument position leaked
per call (println(string.concat(a, b))). The interpolation form already
freed its temporaries; the direct-argument form never did, for every heap
producer. Both forms now route through owned-print helpers that print and
free in one step; bound identifiers keep their scope-exit free.

string.replace(s, old, new) and string.replace_all(s, old, new)
(#1331). Non-overlapping left-to-right matches, byte-exact and binary-safe;
new may be empty (deletion) or longer than old; empty old returns a
copy unchanged (Go's strings.Replace guard). Single exact-size allocation
regardless of match count; results are heap-tracked like substring.
Regression: tests/regression/test_std_string_replace.ae.
ae fmt CI gate (#1302). tests/integration/fmt_gate/ enforces the
formatter's documented safety properties on every CI run: all checked-in
.ae sources under std/, examples/, and tests/ are canonically
formatted (ae fmt --check), formatting is idempotent, and a formatted
file's generated C is byte-identical to the original's (modulo #line).
The whole tree was formatted in this change (595 files, whitespace-only);
the IR-preservation property was verified on all 443 compiling program
files before and after: zero differences.

Platform	Architecture	File	Notes
Linux	x86_64	`aether-0.463.0-linux-x86_64.tar.gz`
macOS	x86_64	`aether-0.463.0-macos-x86_64.tar.gz`
macOS	arm64	`aether-0.463.0-macos-arm64.tar.gz`
Windows	x86_64	`aether-0.463.0-windows-x86_64.zip`
FreeBSD	x86_64	`aether-0.463.0-freebsd-x86_64.tar.gz`	cross-built, not tested on FreeBSD

Linux / macOS

# Download the archive for your platform, then:
tar -xzf aether-0.463.0-<platform>.tar.gz
export PATH="$PWD/bin:$PATH"
ae version

Windows

Extract the .zip archive, then run bin\ae.exe version from the extracted folder.