gistfile1.txt

$ crystal threads.cr 
#<Thread:0x1023dffc0 @th=nil, @exception=nil, @detached=false, @func=#<Proc(Nil):0x102073f60>, @current_fiber=#<Fiber:0x1023def50: main>>
Invalid memory access (signal 11) at address 0x48
Invalid memory access (signal 11) at address 0x48
Invalid memory access (signal 11) at address 0x48

[4329024091] *CallStack::print_backtrace:Int32 +107
[4329024091] *CallStack::print_backtrace:Int32 +107
[4329024091] *CallStack::print_backtrace:Int32 +107
[4329009207] __crystal_sigfault_handler +55
[4329009207] __crystal_sigfault_handler +55
[4329009207] __crystal_sigfault_handler +55
[140735729448234] _sigtramp +26
[140735729448234] _sigtramp +26
[140735729448234] _sigtramp +26
[4329015772] *Fiber#to_s<String::Builder>:String::Builder +92
[4329015772] *Fiber#to_s<String::Builder>:String::Builder +92
[4329015772] *Fiber#to_s<String::Builder>:String::Builder +92
[4329015673] *Fiber#inspect<String::Builder>:String::Builder +9
[4329015673] *Fiber#inspect<String::Builder>:String::Builder +9
[4329015673] *Fiber#inspect<String::Builder>:String::Builder +9
[4329017225] *Thread@Reference#inspect<String::Builder>:Nil +777
[4329017225] *Thread@Reference#inspect<String::Builder>:Nil +777
[4329017225] *Thread@Reference#inspect<String::Builder>:Nil +777
[4329016418] *Thread@Object#inspect:String +66
[4329016418] *Thread@Object#inspect:String +66
[4329016418] *Thread@Object#inspect:String +66
[4329009425] ~procProc(Nil)@./threads.cr:7 +17
[4329009457] ~procProc(Nil)@./threads.cr:8 +17
[4329009489] ~procProc(Nil)@./threads.cr:9 +17
[4329018305] *Thread#start:(Exception+ | Nil) +65
[4329018305] *Thread#start:(Exception+ | Nil) +65
[4329018305] *Thread#start:(Exception+ | Nil) +65
[4329009401] ~procProc(Pointer(Void), (Exception | Nil))@/usr/local/Cellar/crystal-lang/0.19.2/src/thread.cr:19 +9
[4329009401] ~procProc(Pointer(Void), (Exception | Nil))@/usr/local/Cellar/crystal-lang/0.19.2/src/thread.cr:19 +9
[4329009401] ~procProc(Pointer(Void), (Exception | Nil))@/usr/local/Cellar/crystal-lang/0.19.2/src/thread.cr:19 +9
[4329586090] GC_inner_start_routine +90
[4329586090] GC_inner_start_routine +90
[4329586090] GC_inner_start_routine +90
[4329569928] GC_call_with_stack_base +27
[4329569928] GC_call_with_stack_base +27
[4329569928] GC_call_with_stack_base +27
[140735840500125] _pthread_body +131
[140735840500125] _pthread_body +131
[140735840500125] _pthread_body +131
[140735840499994] _pthread_start +168

thread-test.cr

require "thread"

puts Thread.current.inspect

threads = [] of Thread

threads << Thread.new { puts Thread.current.inspect }
threads << Thread.new { puts Thread.current.inspect }
threads << Thread.new { puts Thread.current.inspect }

threads.each &.join