0.5.0-dev segfaults on bad input

[ethomag]

$ ./julia
               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: http://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.5.0-pre+5606 (2016-07-21 19:23 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 5fe9e53 (0 days old master)
|__/                   |  x86_64-linux-gnu

julia> xxx

signal (11): Segmentation fault
while loading no file, in expression starting on line 0
jl_f_tuple at /home/ethomag/julia/src/builtins.c:648
eval_user_input at ./REPL.jl:74
jl_call_method_internal at /home/ethomag/julia/src/julia_internal.h:177 [inlined]
jl_apply_generic at /home/ethomag/julia/src/gf.c:2034
macro expansion at ./REPL.jl:92 [inlined]
#3 at ./event.jl:46
jl_call_method_internal at /home/ethomag/julia/src/julia_internal.h:177 [inlined]
jl_apply_generic at /home/ethomag/julia/src/gf.c:2034
jl_apply at /home/ethomag/julia/src/julia.h:1394 [inlined]
start_task at /home/ethomag/julia/src/task.c:253
unknown function (ip: 0xffffffffffffffff)
Allocations: 1379068 (Pool: 1378193; Big: 875); GC: 0
Segmentation fault (core dumped)

[Keno]

@JeffBezanson saw this earlier as well. It appears to be an instance of #17288.

[c42f]

I just ran into this as well - @vtjnash it seems that something from the #17518 merge caused this as reverting to 1fcb81c has worked around it for me.

I'm amused by the following:

julia> x

signal (11): Segmentation fault
...

[tkelman]

How is it possible these slipped by without causing test failures?

[yuyichao]

Dup of #17288

[c42f]

@tkelman good question! I only had time for a quick look, but it seemed oddly specific to a code path involving REPL pretty printing of errors, and this isn't something you hit if you run the tests unattended.