C error when assigning to an invalid assignment target

[zeozeozeo]

V doctor:

V full version: V 0.4.7 423f804.9c0a7e7
OS: windows, Microsoft Windows 10 Pro v19045 64-bit
Processor: 10 cpus, 64bit, little endian, 

getwd: C:\Users\user\Downloads
vexe: C:\Users\user\Desktop\Code\v\v.exe
vexe mtime: 2024-09-26 18:24:47

vroot: OK, value: C:\Users\user\Desktop\Code\v
VMODULES: OK, value: C:\Users\user\.vmodules
VTMP: OK, value: C:\Users\user\AppData\Local\Temp\v_0

Git version: git version 2.42.0.windows.1
Git vroot status: weekly.2024.08-1141-g9c0a7e79
.git/config present: true

CC version: Error: 'cc' is not recognized as an internal or external command,

operable program or batch file.


thirdparty/tcc status: thirdparty-windows-amd64 b425ac82

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

fn main() {
	a := 69
	b := 420
	a * b = a + b
}

What did you expect to see?

Syntax error.

What did you see instead?

================== C compilation error (from tcc): ==============
cc: C:/Users/user/AppData/Local/Temp/v_0/bug.01J8QSA2538SDKXFHPZH7ET7CD.tmp.c:7009: warning: implicit declaration of function 'tcc_backtrace'
cc: C:/Users/user/AppData/Local/Temp/v_0/bug.01J8QSA2538SDKXFHPZH7ET7CD.tmp.c:13477: error: lvalue expected
... (the original output was 3 lines long, and was truncated to 2 lines)
=================================================================
(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 .

Relevant C code:

VV_LOCAL_SYMBOL void main__main(void) {
	int a = 69;
	int b = 420;
	(int)(a * b) = (int)(a + b);
}

The Crafting Interpreters book mentions a similar issue in §21.4 (the expression parser should only consume = if it's in a context of a low-precedence expression): https://craftinginterpreters.com/global-variables.html#assignment

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