chore: release v0.0.4

[MagicalTux]

🤖 New release

• rustygo: 0.0.3 -> 0.0.4 (⚠ API breaking changes)

⚠ rustygo breaking changes

--- failure constructible_struct_adds_field: struct exhaustively constructible through public API adds field ---

Description:
A pub struct that could be exhaustively constructed with a literal using only public API has a new pub field, breaking existing exhaustive literals.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.51.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field TypeDesc.make_slice in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:99
  field TypeDesc.ptr in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:111
  field TypeDesc.arrays in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:122
  field TypeDesc.chan_dir in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:131
  field TypeDesc.chan_ops in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:139
  field TypeDesc.make_func in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:155
  field TypeDesc.make_slice in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:99
  field TypeDesc.ptr in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:111
  field TypeDesc.arrays in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:122
  field TypeDesc.chan_dir in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:131
  field TypeDesc.chan_ops in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:139
  field TypeDesc.make_func in /tmp/.tmp8j2CBy/rustygo/src/iface.rs:155

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.51.0/src/lints/inherent_method_missing.ron

Failed in:
  Chan::can_recv, previously in file /tmp/.tmpaLR4Bl/rustygo/src/chan.rs:279
  Chan::can_send, previously in file /tmp/.tmpaLR4Bl/rustygo/src/chan.rs:288
  Chan::can_recv, previously in file /tmp/.tmpaLR4Bl/rustygo/src/chan.rs:279
  Chan::can_send, previously in file /tmp/.tmpaLR4Bl/rustygo/src/chan.rs:288

Changelog

0.0.4 - 2026-10-07

Other

• CI has been red since October 4th, and this is why
• The M:N scheduler, landing at one worker
• What more than one worker gets wrong is memory, not a context
• The parallel program runs at the GOMAXPROCS it is given
• The roadmap says what more than one worker still gets wrong
• reflect's TryRecv had the race select had
• One worker by default, and what is known about why
• A collector that loses a race was still holding its roots on its thread
• Two workers by default, until three stop corrupting a context
• Which goroutine is leaving is the scheduler's to say, not the caller's
• Stopping the world, and GOMAXPROCS at the number of CPUs
• Goroutines on worker threads, and a park that cannot lose a wakeup
• Runtime state that belongs to a thread, and state that belongs to the program
• 74 programs, and the whole set passes under torture as well as plainly
• reflect.ArrayOf, answered from the arrays a program already has
• A struct holding a func value does not have gc's layout
• The standard descriptors, closed by their own finalizers
• 127 of Go's own tests, with recover.go whole
• recover sees through the frames that stand in for a deferred call
• The missing descriptor that is not missing
• A timer that must fire while a goroutine spins, not only while it parks
• HTTP/2, and what the BoGo suite says
• What crypto's own tests say, and the two things crypto/tls still trips on
• HTTP/2 over TLS, and large bodies with it
• The clock syscall reads directly, and the bridge into libc it never crosses
• reflect.MakeFunc, which is Value.Call run backwards
• A named map or channel that contains itself, through the same name
• A pointer the collector cannot see, because it became an integer
• The metrics and the GC statistics the collector can actually answer
• Why an allocation test fails, now that it has been measured
• gRPC, protobuf, Prometheus and pgx compile, so the table should say so
• The three tables, measured on this tree instead of three trees ago
• What the threaded scheduler found before it found its own bug
• A map lookup keyed on bytes does not need the string either
• One copy where string and []byte conversions made two
• The HTTPS program makes its own certificate
• The runtime hooks that each stopped one package building
• A named func type that returns itself
• one document for the packages a sweep had time for and the rest
• noasm, which is what libraries outside the standard library call purego
• which failures to count apart is the report's judgement, not the sweep's
• What the front page claims, brought back to what is true
• One conversion, nine comparisons, and none of them made a string
• Where the allocations rustygo makes and gc does not actually are
• How a program outside the standard library reaches the kernel
• Comparing bytes as a string without making the string
• The types reflect can be asked to make, and the one it can make
• Channels through reflection, and what a type says about ranging
• What the compiler can express, measured for the whole library at once
• measure what cannot be built, and in what order to fix it
• Sleep gives up the processor however short it is
• A read deadline is a moment, and it was being read as a duration
• A differential program for the file layer
• $GODEBUG reaches the standard library, and SIGSYS can be ignored
• A tick says when it was due, a reset does not queue a timer twice, and a
• A goroutine that only makes system calls lets the others run
• A loop that does not wait for rustc
• The same system call on every thread, where there is one
• Signals reach Go, and a broken standard output ends the program
• What os, time and net/url could not even type-check
• The FIPS module's XOR, under Rust's rules about alignment
• A big array is filled in place, not built on the stack first
• HTTPS, end to end, in one process
• A run cap that a TLS handshake fits inside under GC torture
• encoding/json passes its own test suite
• A named type that contains itself
• Do not commit the worktrees agents work in
• Build one package at a time
• Goexit through a frame that defers, and a test binary's own directory

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