Nimsuggest crash on libp2p example

[econsta]

Nim Version

Nim Compiler Version 2.2.4 [Linux: amd64] Compiled at 2025-04-22 Copyright (c) 2006-2025 by Andreas Rumpf

git hash: f7145dd26efeeeb6eeae6fff649db244d81b212d active boot switches: -d:release

Description

nimsuggest is crashing when trying to analyze this example file from the libp2p repository:

import chronos
import libp2p
import libp2p/protocols/ping

proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
  var switch = SwitchBuilder
    .new()
    .withRng(rng)
    .withAddress(ma)
    .withTcpTransport()
    .withMplex()
    .withNoise()
    .build()

  return switch

proc main() {.async.} =
  let
    rng = newRng()
    localAddress = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
    pingProtocol = Ping.new(rng = rng)
  let
    switch1 = createSwitch(localAddress, rng)
    switch2 = createSwitch(localAddress, rng)

  switch1.mount(pingProtocol)
  await switch1.start()
  await switch2.start()
  let conn =
    await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, PingCodec)
  echo "ping: ", await pingProtocol.ping(conn)

  await conn.close()
  await allFutures(switch1.stop(), switch2.stop())

waitFor(main())

Current Output

When trying to do a suggestion from a randomly selected line it prints a list of errors long enough that my terminal can't print them all. If there is a way to save that output to a log file I can include that.

Expected Output

Known Workarounds

No response

Additional Information

I originally noticed this issue when using nimlangserver on NeoVim. When opening the file nimlangserver proceeded to eat up all my system resources until my windows manager crashed.

[Araq]

Is this also reproducible with nim check?

[econsta]

If I nim check ./src/main.nim it gives this hint

152384 lines; 5.529s; 666.516MiB peakmem; proj: /home/emmanuel/projects/blockchain/src/main.nim; out: unknownOutput [SuccessX]

[Araq]

Ok, so it really is nimsuggest specific then.