Regression in reload() Results in REPL Hanging

[fundamental]

Steps to Replicate

• Build from the git HEAD
• create a julia file 'dummy.jl' either with no contents or some basic code
• run julia
• reload("dummy.jl") # you get the expected behavior here
• reload("dummy.jl") # The REPL will hang after executing the contents of the file

Attempting to ^C the process results in

ERROR: interrupt
in event_loop at multi.jl:1375
in anonymous at client.jl:287

General System Info

Slackware 14.0 Linux 32 bit

Backtrace

#0  0xb687c5c6 in ?? ()
#1  0xb687c15c in ?? ()
#2  0xb687be37 in ?? ()
#3  0xb6f8da79 in jl_apply (f=0x88aded0, args=0xbfffe9b0, nargs=1) at julia.h:1018
#4  0xb6f90ec1 in jl_trampoline (F=0x88aded0, args=0xbfffe9b0, nargs=1) at builtins.c:791
#5  0xb6f85bd8 in jl_apply (f=0x88aded0, args=0xbfffe9b0, nargs=1) at julia.h:1018
#6  0xb6f89af4 in jl_apply_generic (F=0x88adeb0, args=0xbfffe9b0, nargs=1) at gf.c:1387
#7  0xb687bdec in ?? ()
#8  0xb6f8da79 in jl_apply (f=0x8af7360, args=0x0, nargs=0) at julia.h:1018
#9  0xb6f90ec1 in jl_trampoline (F=0x8af7360, args=0x0, nargs=0) at builtins.c:791
#10 0xb6fefb27 in jl_apply (f=0x8af7360, args=0x0, nargs=0) at julia.h:1018
#11 0xb6ff045e in start_task (t=0x89a4330) at task.c:376
#12 0xb6ff008a in switch_stack (t=0x89a4330, where=0x89a434c) at task.c:187
#13 0xb6ff00ec in jl_switch_stack (t=0x89a4330, where=0x89a434c) at task.c:197
#14 0xb6fef567 in julia_trampoline (argc=0, argv=0xbfffec68, pmain=0x8049eb1 <true_main>) at init.c:593
#15 0x0804a267 in main (argc=0, argv=0xbfffec68) at repl.c:303

Timeline

This bug appears to have appeared within the last week and it is not isolated to my system (replicated on an OSX? machine).

[pao: formatting]

[milktrader]

Second call to reload() hangs on OSX too.

Control C won't let me escape either

 in event_loop at multi.jl:1371
 in anonymous at client.jl:287

[milktrader]

I don't understand git bisect, but fwiw the issue happened on or before this commit
540e6cd5f2edb1954a745f452e5c96eeeb687c67 remove more underscores

[milktrader]

On or before

a8f9da3299fea3816d6d8f591b2cb240339a0e65 Merge branch 'master' of github.com:JuliaLang/julia

This could take me all day, I need to learn this bisecting technique. (note to self)

[pao]

@fundamental A heads up that quoting code/output blocks should be done with triple-backquote fences rather than bird notation to prevent weirdness with GitHub's autolinker (which here added crossreference links in issues 1-15 in this tracker).

[milktrader]

Awesome, works fine now. Thanks for the quick turn around

[aviks]

@milktrader pao and timholy explain git bisect in this issue : #1689

I found that really helpful.