V error when trying to get shared array slice inside rlock { ... }

[islonely]

V version: V 0.4.9 36154b8, press to see full `v doctor` output

V full version	V 0.4.9 4225a34.36154b8
OS	macos, macOS, 15.1.1, 24B91
Processor	8 cpus, 64bit, little endian, Apple M3
Memory	0.25GB/16GB
V executable	/Users/adamoates/v/v
V last modified time	2025-01-10 18:21:11
V home dir	OK, value: /Users/adamoates/v
VMODULES	OK, value: /Users/adamoates/.vmodules
VTMP	OK, value: /tmp/v_501
Current working dir	OK, value: /Users/adamoates/Documents/shattlebip
Git version	git version 2.39.5 (Apple Git-154)
V git status	weekly.2025.1-27-g36154b86
.git/config present	true
cc version	Apple clang version 16.0.0 (clang-1600.0.26.4)
gcc version	Apple clang version 16.0.0 (clang-1600.0.26.4)
clang version	Apple clang version 16.0.0 (clang-1600.0.26.4)
tcc version	tcc version 0.9.28rc 2024-02-05 HEAD@105d70f7 (AArch64 Darwin)
tcc git status	thirdparty-macos-arm64 713692d4
emcc version	N/A
glibc version	N/A

What did you do?
./v -g -o vdbg cmd/v && ./vdbg /Users/adamoates/Documents/test.v && /Users/adamoates/Documents/test

struct Foo {
pub mut:
	buf shared []u8
}

fn main() {
	mut foo := Foo{}
	rlock foo.buf {
		if foo.buf.len > 0 {
			x := 10
			println('first ${x} bytes: ' + foo.buf[..x].str())
		} else {
			println('no data')
		}
	}
}

What did you see?

/Users/adamoates/Documents/test.v:11:39: error: you have to create a handle and `rlock` it to use a `shared` element as non-mut receiver
    9 |         if foo.buf.len > 0 {
   10 |             x := 10
   11 |             println('first ${x} bytes: ' + foo.buf[..x].str())
      |                                                ~~~~~~~~
   12 |         } else {
   13 |             println('no data')
/Users/adamoates/Documents/test.v:11:39: error: you have to create a handle and `rlock` it to use a `shared` element as non-mut argument to print
    9 |         if foo.buf.len > 0 {
   10 |             x := 10
   11 |             println('first ${x} bytes: ' + foo.buf[..x].str())
      |                                                ~~~~~~~~
   12 |         } else {
   13 |             println('no data')

What did you expect to see?

Expected code to compile.

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