gc orc/arc bug

repro.sh

#!/bin/bash

# wasi-sdk from https://github.com/WebAssembly/wasi-sdk/releases

# Nim git

PATH=/opt/wasi-sdk-21.0/bin:$PATH ./Nim/bin/nim \
 --exceptions:goto \
 --cc:clang -d:wasi --threads:off -d:emscripten --cpu:wasm32 \
 --passC="-m32 -D_WASI_EMULATED_SIGNAL -D_WASI_EMULATED_MMAN" \
 --passL="-m32 -Wl,--export-all -mexec-model=reactor -lwasi-emulated-signal -lwasi-emulated-mman" \
 -r c --out:out.wasi repro_inittable.nim

wasmtime --invoke setup $(pwd)/out.wasi

repro_inittable.nim

import std/tables

var
    # initTable will crash on wasi
    table = initTable[string, Table[int, proc () : void] ]()
    # this will not
    # table : Table[string, Table[int, proc () : void] ]


when defined(wasi):
    proc initialize(argc: cint, args: ptr UncheckedArray[cstring], env: ptr UncheckedArray[cstring]): int {.importc: "main".}


proc setup() : void {.exportC:"setup".} =
    when defined(wasi):
        echo "_initialized"
        discard initialize(0,nil,nil)
    var
        tcb : Table[int, proc () : void]
    echo "begin"
    tcb[1] = proc() = discard
    var notused = table.mGetOrPut("hmm" , tcb )
    echo "end"

    # CRASH HERE

when not defined(wasi):
    setup()