bootstrap: Error: internal error: environment misses: s

[timotheecour]

in nim-lang#16699

$nim_csources_local_X c -r compiler/nim
(0.20.0)

/Users/timothee/git_clone/nim/Nim_prs/compiler/lexer.nim(1084, 31) template/generic instantiation from here
/Users/timothee/git_clone/nim/Nim_prs/lib/pure/strutils.nim(1457, 56) Error: internal error: environment misses: s
    func dedent*(s: string, count: Natural = indentation(s)): string =
                                                         ^

note

it's not clear yet how to minimize this because these work fine:

when defined case1:
  proc bar(a: int): int = a
  proc fn(a: int, b = bar(a)) = discard
  fn(2)
when defined case3:
  import std/strutils
  echo dedent("foo")

workaround:

proc dedent(a: string): string =
  # pending https://github.com/timotheecour/Nim/issues/521
  let b = a
  let i = indentation(b)
  dedent(a, i)