SegFault Julia 1.11 when providing label_components with a vector

[behinger]

took me a while to figure out, but label_components runs into segfault with vectors.

label_components([4.0, 0.0, 10.0, 0.0, 3.0, 4.0, 0, 4.0, 4.0, 0.0, 0.0, 5.0] .> 0.9)

results in:

[3135306] signal 11 (128): Segmentation fault                              
in expression starting at REPL[8]:1                                        
getindex at ./essentials.jl:917 [inlined]                                                                                                              
find_root! at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:134 [inlined]                                                       
#label_components!#13 at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:95                                                       
label_components! at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:62 [inlined]                                                 
#label_components#11 at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:41 [inlined]                                              
label_components at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:41 [inlined]                                                  
#label_components#10 at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:40 [inlined]                                              
label_components at /home/ehinger/.julia/packages/ImageMorphology/zxdrG/src/connected.jl:40                                                            
unknown function (ip: 0x7ffa5794d1f2)                                                                                                                  
jl_apply at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/julia.h:2157 [inlined]
do_call at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/interpreter.c:126                                                        
eval_value at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/interpreter.c:223                                                     
eval_stmt_value at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/interpreter.c:174 [inlined]                                      
eval_body at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/interpreter.c:663                                                      
jl_interpret_toplevel_thunk at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/interpreter.c:821                                    
jl_toplevel_eval_flex at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/toplevel.c:943                                             
jl_toplevel_eval_flex at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/toplevel.c:886                                             
ijl_toplevel_eval_in at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/toplevel.c:994                                              
eval at ./boot.jl:430 [inlined]                                                                                                                        
eval_user_input at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:245
repl_backend_loop at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:342                  
#start_repl_backend#59 at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:327             
start_repl_backend at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:324                 
#run_repl#72 at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:483                       
run_repl at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:469                           
jfptr_run_repl_10104.1 at /opt/julia-1.11.2/share/julia/compiled/v1.11/REPL/u0gqU_4x0TT.so (unknown line)                                              
#1150 at ./client.jl:446                                                                                                                               
jfptr_YY.1150_14803.1 at /opt/julia-1.11.2/share/julia/compiled/v1.11/REPL/u0gqU_4x0TT.so (unknown line)
jl_apply at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/julia.h:2157 [inlined]                                                  
jl_f__call_latest at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/builtins.c:875                                                 
#invokelatest#2 at ./essentials.jl:1055 [inlined]                                                                                                      
invokelatest at ./essentials.jl:1052 [inlined]                             
run_main_repl at ./client.jl:430                                           
repl_main at ./client.jl:567 [inlined]
_start at ./client.jl:541                                                  
jfptr__start_73406.1 at /opt/julia-1.11.2/lib/julia/sys.so (unknown line)
jl_apply at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/julia.h:2157 [inlined]
true_main at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/jlapi.c:900                                                            
jl_repl_entrypoint at /cache/build/tester-amdci5-12/julialang/julia-release-1-dot-11/src/jlapi.c:1059                                                  
main at julia (unknown line)                                                                                                                           
unknown function (ip: 0x7ffa6eddfd8f) 
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)        
unknown function (ip: 0x4010b8)                                            
Allocations: 15110511 (Pool: 15107790; Big: 2721); GC: 13
[1]    3135306 segmentation fault (core dumped)  julia    

In earlier Julia versions (I tested 1.8) it results not in SegFault but in StackOverflow. Maybe this is something to catch with a type annotation - it was relatively bothersome to debug.

edit: Strangely, label_components([4.0, 0.0, 10.0] .> 0.9) seems to work...