Thanks, the “one off” shouldn’t really hurt, you’re right.
But it doesn’t seem to work for me (Crystal 1.8.1 on Ubuntu)…
class X
def initialize
GC.before_collect do
end
end
end
X.new
GC.collect
… leads to…
Stack overflow (e.g., infinite or very deep recursion)
[0x55c2e81c47c6] *Exception::CallStack::print_backtrace:Nil +118 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e81b3ff6] ~procProc(Int32, Pointer(LibC::SiginfoT), Pointer(Void), Nil) +310 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x7fdd94d39980] ?? +140589661395328 in /lib/x86_64-linux-gnu/libpthread.so.0
[0x55c2e81b13c1] ~procProc(Nil) +17 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e81b14c7] ~procProc(Nil) +279 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp (140587164552344 times)
[0x55c2e823dd10] GC_mark_some +1392 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e823693d] ?? +94295606651197 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e8236719] GC_try_to_collect_inner +329 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e82374a8] ?? +94295606654120 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e823751a] GC_gcollect +10 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e81d9346] *GC::collect:Nil +6 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e81a3d2b] __crystal_main +1051 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e8235c96] *Crystal::main_user_code<Int32, Pointer(Pointer(UInt8))>:Nil +6 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e8235c0a] *Crystal::main<Int32, Pointer(Pointer(UInt8))>:Int32 +58 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x55c2e81b12d6] main +6 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp
[0x7fdd940e2c87] __libc_start_main +231 in /lib/x86_64-linux-gnu/libc.so.6
[0x55c2e81a382a] _start +42 in .../snap/crystal/common/.cache/crystal/crystal-run-gc.tmp