Q: no Cairo rendering? Segfault for PNG?

[cmundi]

I'm looking for hints on debugging this.
Platform is Debian jessie.
Julia is built from fresh sources:

$git describe
v0.2.0-2230-g8ea3351

and I did a Pkg.update() to make sure I have the best stuff:

julia> Pkg.status()
7 required packages:
 - Cairo                         0.2.12
 - Gadfly                        0.2.6
...

I can generate SVG just fine, but PNG segfaults:

draw(SVG("test.svg", 3inch, 3inch), plot(x=randn(10), y=randn(10)))  # ok
draw(PNG("test.png", 3inch, 3inch), plot(x=randn(10), y=randn(10))) # segfault

Of course it does not matter if I am orthodox instead of heretical. Same results. Any ideas? My libs are shown below.

According to dpkg -l I have the following installed:

libcairo2                      1.12.16-2
libpango-1.0-0            1.36.0-1
libpng12-0                   1.2.49-5
libfontconfig1              2.11.0-2

P.S. Gadfly is awesome and I really like the semantic approach to visualization (even though I talk like a heretic when I'm in a hurry).

[dcjones]

I tried this an arch and ubuntu install both with similar libraries and couldn't get it to crash, so I'm not sure what the deal is.

Do you have experience with gdb? What would help a lot if you ran:

gdb --ex run --args julia test.jl

Where test.jl is julia program that segfaults. When it segfaults, type bt into the prompt and it will print a backtrace. If you copy/paste that output here it will help a lot with debugging this.

[cmundi]

Thanks for your reply. No problem: There's a testfile and a backtrace in this gist. Whatever is happening appears to be in Julia's io and not related to the Cairo and PNG libs. I'm happy to gather more data.

[cmundi]

I apologize! My "fresh" Julia build was accidentally picking up LLVM 3.4. I just rebuilt using LLVM 3.3 and Gadfly is again working as expected. I'm sorry for the distraction.

[cmundi]

FYI: reproduced a little more cleanly and posted JuliaLang/julia#6369