cgen error: `-(-2)` translated into `--2`

[forchid]

Describe the bug

V translates the expression -(-2) into --2 in C source!

Reproduction Steps

the test

testfiles> v conv_test.v
================== C compilation error (from tcc): ==============
cc: .../AppData/Local/Temp/v_0/conv_test.01KN93ZGHHYE13ZDTMGXHT5X09.tmp.c:8144: warning: implicit declaration of function 'GetFinalPathNameByHandleW'
cc: .../AppData/Local/Temp/v_0/conv_test.01KN93ZGHHYE13ZDTMGXHT5X09.tmp.c:8548: error: lvalue expected
...
cc: .../AppData/Local/Temp/v_0/conv_test.01KN93ZGHHYE13ZDTMGXHT5X09.tmp.c:8548: error: lvalue expected
(note: the original output was 9 lines long; it was truncated to its first 2 lines + the last line)
=================================================================
Try passing `-g` when compiling, to see a .v file:line information, that correlates more with the C error.
(Alternatively, pass `-show-c-output`, to print the full C error message).
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 .

the source

// conv_test.v
import strconv

fn test_atoi() ! {
  i := -(-2)
  assert strconv.atoi('1')! == 1
  assert strconv.atoi('-2')! == -2
  assert strconv.atoi('+2')! == i - 1 + 1
  //assert strconv.atoi('+2')! == -(-2)
}

Expected Behavior

Compiling ok.

Current Behavior

Failed to compile.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.5.1 0c3183c

Environment details (OS name and version, etc.)

Windows 10 x64.

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