[BUG] Segfault when hovering the mouse over a const

[Liozou]

Julia segfaults when I hover my mouse over a value defined as a const.

Details

• Atom version: 1.52.0
• Julia version: 1.5.0 and master
• OS: Ubuntu
• Package versions:
  • Atom.jl: 0.12.24
  • julia-client: 0.12.26
  • ink: 0.12.5

Steps to reproduce

I'm not sure this is fully minimal but here is a somewhat small reproducer:

• Create a local package and dev it: here I called it TEST.
• Add a dependency: I used Logging below but it also crashed with Serialization for instance.
• Create a const from a type that comes from the dependency.
• Open your REPL, call your package with using TEST
• Hover your mouse above the name of the const and don't move it.

The full stacktrace is:

signal (11): Segmentation fault
in expression starting at none:0
uv_fileno at /workspace/srcdir/libuv/src/unix/core.c:729
_fd at ./stream.jl:1065 [inlined]
show at ./stream.jl:205
unknown function (ip: 0x7f0b7dc48005)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2231 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
_show_default at ./show.jl:406
show_default at ./show.jl:389 [inlined]
show at ./show.jl:384 [inlined]
show at ./multimedia.jl:47 [inlined]
__binrepr at ./multimedia.jl:161 [inlined]
_textrepr at ./multimedia.jl:151 [inlined]
#repr#1 at ./multimedia.jl:147
repr##kw at ./multimedia.jl:147
unknown function (ip: 0x7f0b7dc47ce5)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2231 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
processval! at /home/liozou/.julia/packages/Atom/MxsDb/src/datatip.jl:115
unknown function (ip: 0x7f0b7dc47630)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2231 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
globaldatatip at /home/liozou/.julia/packages/Atom/MxsDb/src/datatip.jl:66
datatip at /home/liozou/.julia/packages/Atom/MxsDb/src/datatip.jl:27
unknown function (ip: 0x7f0b7dc32077)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2214 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
#311 at /home/liozou/.julia/packages/Atom/MxsDb/src/datatip.jl:16
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2214 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
handlemsg at /home/liozou/.julia/packages/Atom/MxsDb/src/comm.jl:169
unknown function (ip: 0x7f0b7dba9feb)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2214 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
jl_apply at /buildworker/worker/package_linux64/build/src/julia.h:1690 [inlined]
do_apply at /buildworker/worker/package_linux64/build/src/builtins.c:655
#31 at ./task.jl:356
unknown function (ip: 0x7f0b7db9cc44)
_jl_invoke at /buildworker/worker/package_linux64/build/src/gf.c:2214 [inlined]
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2398
jl_apply at /buildworker/worker/package_linux64/build/src/julia.h:1690 [inlined]
start_task at /buildworker/worker/package_linux64/build/src/task.c:707
unknown function (ip: (nil))
Allocations: 29317955 (Pool: 29310829; Big: 7126); GC: 31

I will probably open an issue on the main Julia repo as well, unless you think it's not worth it.

[pfitzseb]

I can't repro this on Julia 1.5.0 and [email protected]. This does indeed seem like a Base issue, given that the segfault occurs somewhere in repr.

[Liozou]

Looking into the Atom source files, I can reproduce the issue simply by calling Atom.globaldatatip("TEST", "customLogger") after loading the TEST module defined like in the gif. It still does not crash for you?

[pfitzseb]

Nope.

[Liozou]

All right. I'm trying to reduce it further and once it's done I'll report it upstream.