Nim compiler is running into a recursion limit while trying to expand templates

[shashankshampi]

This issue can happen when there are too many nested templates or when the compiler can't efficiently manage deep template instantiations.

Current template: tests/asyncunit.nim
import unittest2, chronos

export unittest2, chronos

template asyncTeardown*(body: untyped): untyped =
teardown:
waitFor(
(
proc() {.async.} =
body
)()
)

template asyncSetup*(body: untyped): untyped =
setup:
waitFor(
(
proc() {.async.} =
body
)()
)

template asyncTest*(name: string, body: untyped): untyped =
test name:
waitFor(
(
proc() {.async.} =
body
)()
)

How to Reproduce:

Add the below test in file tests/pubsub/testgossipinternal.nim and then run any of them nim c -r tests/pubsub/testgossipinternal.nim "handle multiple SUBSCRIBE and UNSUBSCRIBE events"

Test file attached.
message.txt

Error Log:
This will crash with log below and when you do the same thing in the new file by adding the same test in the new file and running it works fine without any error.

error.log

[AlejandroCabeza]

Removed assignments so they are properly done during weekly.

[tersec]

I can't reproduce this on NIm v2.0.12, running within nimbus-eth2 nimbus-build-system environment:

$ ../../env.sh nim c -r tests/pubsub/testgossipinternal.nim "handle multiple SUBSCRIBE and UNSUBSCRIBE events"
... it compiles ...
GossipSub internal WRN 2024-12-08 13:42:23.761+01:00 service is already stopped                 topics="libp2p switch" tid=1946825 file=switch.nim:79
WRN 2024-12-08 13:42:23.761+01:00 TCP transport already stopped              topics="libp2p tcptransport" tid=1946825 file=tcptransport.nim:209
. (0.00s)
[Summary] 1 tests run (0.00s): 1 OK, 0 FAILED, 0 SKIPPED

[tersec]

With specific tests/pubsub/testgossipinternal.nim used attached.

testgossipinternal.nim.txt

Nim Compiler Version 2.0.12 [Linux: amd64]
Compiled at 2024-11-04
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: ce7c6f4f3365db2cc63bdd9d460c71ed937ee9e9
active boot switches: -d:release