Save segfault when creating new folder on Mac witj Julia 0.6

[leopoldcambier]

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When opening just a single window, then trying to save the plot, if I create a new folder (using the 'New folder' button), Julia segfaults

Repro

using PyPlot
PyPlot.figure()

then 'save', 'new folder'

Result

signal (11): Segmentation fault: 11
while loading no file, in expression starting on line 0
strlen at /usr/lib/system/libsystem_c.dylib (unknown line)
Allocations: 3764370 (Pool: 3763011; Big: 1359); GC: 6
Segmentation fault: 11

Extra info

Process:               julia [57129]
Path:                  /usr/local/bin/julia
Identifier:            julia
Version:               ???
Code Type:             X86-64 (Native)
Parent Process:        bash [57017]
Responsible:           julia [57129]
User ID:               501
Date/Time:             2017-10-05 10:00:07.999 -0700
OS Version:            Mac OS X 10.12.6 (16G29)

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]