julia nightly build breaks parsing of `let` inside `quote`

[gafter]

% julia-1.9 r.jl
Hello, World!
% julia-nightly r.jl
ERROR: LoadError: syntax: invalid let syntax around /Users/nealgafter/Repos/Rematch2.jl/tmp/r.jl:5
Stacktrace:
 [1] top-level scope
   @ ~/Repos/Rematch2.jl/tmp/r.jl:11
in expression starting at /Users/nealgafter/Repos/Rematch2.jl/tmp/r.jl:11
% julia-nightly
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.10.0-DEV.1392 (2023-05-27)
 _/ |\__'_|_|_|\__'_|  |  Commit 248ceda3c49 (1 day old master)
|__/                   |

julia> versioninfo(); exit(0)
Julia Version 1.10.0-DEV.1392
Commit 248ceda3c49 (2023-05-27 13:39 UTC)
Platform Info:
  OS: macOS (arm64-apple-darwin22.4.0)
  CPU: 12 × Apple M2 Max
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, apple-m1)
  Threads: 1 on 8 virtual cores
Environment:
  JULIA_SSL_CA_ROOTS_PATH = 
  JULIA_EDITOR = vim
% cat -n r.jl 
     1	s = Set{Symbol}([:a, :b, :c])
     2	
     3	macro x()
     4	    quote
     5	        let $(s...)
     6	            println("Hello, World!")
     7	        end
     8	    end
     9	end
    10	
    11	@x
% 

I installed julia by downloading the Apple silicon package, mounting it, and dragging the julia app into Applications.

[inkydragon]

Confirmed.

macro z()
    :(let a; println("Hello, `let`!") end)
end
@z
# Hello, `let`!

• ✔ Version 1.6.7
• ✔ Version 1.8.5
• ✔ Version 1.9.0
• ✔ Version 1.10.0-DEV.1171 (2023-05-03) Commit 5304baa
• ✔ Version 1.10.0-DEV.1386 (2023-05-26) Commit 23e0b2d
• ❌ Version 1.10.0-DEV.1387 (2023-05-26) Commit ba1391a <--
• ❌ Version 1.10.0-DEV.1394 (2023-05-29) Commit 1cc10a6

git blame: #49897 @vtjnash

julia> macro z()
           :(let a; println("Hello, `let`!") end)
       end
@z (macro with 1 method)

julia> @z
ERROR: syntax: invalid let syntax around REPL[2]:1
Stacktrace:
 [1] top-level scope
   @ REPL[2]:1

julia> :(let a; println("Hello, `let`!") end)
:(let a
      #= REPL[5]:1 =#
      println("Hello, `let`!")
  end)

julia> eval(:(let a; println("Hello, `let`!") end))
Hello, `let`!

julia> versioninfo()
Julia Version 1.10.0-DEV.1394
Commit 1cc10a60404 (2023-05-29 09:20 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 6 × Intel(R) Core(TM) i5-9400F CPU @ 2.90GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, skylake)
  Threads: 1 on 6 virtual cores