Constructor to global variable in converter generates illegal c code

[Tarmean]

This is a tad difficult to explain so I am going to give examples. This generates illegal c code:

type
  Inner =  object
    foo: string
converter toString(i: int): string =
  var g{.global.} = Inner(foo: $i)
var s: string = 4

src\nimcache\converter_test.c: In function 'converter_testInit000':
src\nimcache\converter_test.c:354:30: error: 'i0' undeclared (first use in this function)
LOC100001.foo = nimIntToStr(i0);
^
src\nimcache\converter_test.c:354:30: note: each undeclared identifier is reported only once for each function it appears in

In contrast this does compile and work as expected:

type
  Inner =  object
    foo: string
converter toString(i: int): string =
  var g{.global.} : Inner
   g.foo = $i
var s: string = 4

When the string is constant, say Inner(foo: "bar"), or the converter is invoked explicitely the program also works.

[Tarmean]

I am not sure whether this is related or should be in a new issue, but:

converter conv(s: var string): int =
  echo s
var 
    a = "a"
    b: int = a

crashes with a segmentation fault when nim tries to dereference s. This also only happens if conv is called implicitely.

[cooldome]

I have tested this one, there is nothing converter specific. The following examples fails the same way:

type
  Inner =  object
    foo: string
proc toString(i: int): string =
  var g{.global.} : Inner
   g.foo = $i
var s = toString(4)

Please remove converters label. Makes sense to update the title as well

[bung87]

cannot reproduce in current devel d8d0832