Const block in function cannot evaluate vars at compile time

[tsoj]

Description

A compile time block in a function body doesn't allow the creation of vars. The following example fails to compile:

func stuff(): int =
  const r = block:
    var r = 0 # Error: cannot evaluate at compile time: r
    for i in 0..10:
      r *= i
    r
  r

echo stuff()

When the const block is outside the function, it works however:

const r = block:
  var r = 0
  for i in 0..10:
    r *= i
  r

func stuff(): int =
  r

echo stuff()

Nim Version

Nim Compiler Version 1.9.3 [Linux: amd64]
Compiled at 2023-04-01
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: 1c7fd71
active boot switches: -d:release

Current Output

Hint: used config file '/home/tsoj/.choosenim/toolchains/nim-#devel/config/nim.cfg' [Conf]
Hint: used config file '/home/tsoj/.choosenim/toolchains/nim-#devel/config/config.nims' [Conf]
......................................................................
/tmp/main.nim(3, 9) Error: cannot evaluate at compile time: r

Expected Output

0

or if it's supposed to not compile, a better error message.

Possible Solution

No response

Additional Information

No response

[metagn]

Similar/same #8758 #10828 #12172