C compilation error - cannot take the address of an rvalue of type 'u8'

[dbirjukov]

V doctor:

V full version: V 0.4.8 97c6cd0
OS: macos, macOS, 12.7.6, 21H1320
Processor: 8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz

getwd: /Users/dmitri/Dev/v_projects
vexe: /Users/dmitri/langs/v/v
vexe mtime: 2024-10-23 19:39:48

vroot: OK, value: /Users/dmitri/langs/v
VMODULES: OK, value: /Users/dmitri/.vmodules
VTMP: OK, value: /tmp/v_501

Git version: git version 2.37.1 (Apple Git-137.1)
Git vroot status: weekly.2024.22-767-g97c6cd09
.git/config present: true

CC version: Apple clang version 14.0.0 (clang-1400.0.29.202)
thirdparty/tcc status: thirdparty-macos-amd64 975f1ad8

What did you do?
./v -g -o vdbg cmd/v && ./vdbg bug.v

fn main() {
	a := 'abcd'
	b := a[0].str
	println(typeof(b).name)
}

What did you expect to see?

type name of the 'b' variable

What did you see instead?

================== C compilation error (from cc): ==============
cc: /tmp/v_501/bug.01JAXEEYN87HG0A44RZBZPYSJM.tmp.c:13637:83: error: cannot take the address of an rvalue of type 'u8' (aka 'unsigned char')
cc:         string (*b) (void) = __closure_create(_V_closure_u8_str_36, memdup_uncollectable(&string_at(a, 0), sizeof(u8)));
cc:                                                                                          ^~~~~~~~~~~~~~~~
cc: 1 error generated.
================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error: 
==================
C error found. It should never happen, when compiling pure V code.
This is a V compiler bug, please report it using `v bug file.v`,
or goto https://github.com/vlang/v/issues/new/choose .
You can also use #help on Discord: https://discord.gg/vlang .

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_{Huly®: V_0.6-21084}