Running /spark profiler crashes the game instantly. No crash log is generated. This occurs with only Spark and the Fabric API loaded.
Fabric loader 0.14.6
Minecraft 1.18.2
Fabric API 0.54.0
Spark 1.9.1

hs_err_pid12153.log

Same issue on version 17 of paper MC as well on 1.19, crashes my server and leaves only this pid log
hs_err_pid152.log

Getting similar error on spigot as well.

Same problem, across multiple versions. /sparkc profiler
{Paper 1.18.2, unknown Paper version, profiling while on a public server}
Minecraft 1.18.2
Fabric Loader 0.14.5
Fabric API 0.51.0, 0.54.0
Spark 1.8.14, 1.9.11

hs_err_pid1601.log

Fixed mine with #200

Same here. Can't use spark without specifying --force-java-profiler.
Not sure if this is intended behavior or a bug at this point.

Fixed in 06de991