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Ran 19 Mar 2026 09:16PM UTC

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Committed 19 Mar 2026 04:57AM UTC coverage: 77.495%. First build

Build # 1641

Build Type

Pull #536

buildkite

Committed by

web-flow

Commit Message

Escape `@nospecialize` macro output (#61362)

`@nospecialize` and `@specialize` refer to names passed as macro
arguments, so
should theoretically escape them in their expansion. They currently work
without escaping because macroexpand.scm makes a special case for
`:meta` forms.
Unfortunately, that special handling escapes `:meta` too aggressively:

```
julia> macro mac(x); x; end
@mac (macro with 1 method)

julia> ex = @macroexpand @mac function f(@nospecialize(a))
                  a
              end
:(function Main.f($(Expr(:meta, :nospecialize, :a)))
      #= REPL[2]:1 =#
      #= REPL[2]:2 =#
      var"#2#a"
  end)

julia> func = @mac function f(@nospecialize(a))
                  a
              end
f (generic function with 1 method)

julia> func(1)
ERROR: UndefVarError: `#3#a` not defined in `Main`
```

This PR doesn't fix the above or change any current behaviour, but at
least
ensures that JuliaLowering doesn't need to introduce the same bug. There
are
alternatives if this doesn't work, but all would be hacky.

Pull Request Pull Request #536:

Run Details

64428 of 83138 relevant lines covered (77.5%)

24423485.04 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1641	linux-coverage - 1641	20 Mar 2026 12:30AM UTC	350	76.19
1641	windows-coverage - 1641	20 Mar 2026 01:58AM UTC	318	75.65
1641	macos-coverage - 1641	19 Mar 2026 09:16PM UTC	351	76.17

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