Issue 1:
I'm trying to use Plots.contour. I'm not entirely sure that my objects have the appropriate size/shape for contour.

x is Vector{Float64} with 513 elements

t is Vector{Float64} with 10001 elements

time_steps is 10001x513 Array{Float64,2}

using Plots
Plots.contour(x, t, time_steps)

Illegal inttoptr
​ %37 = ptrtoint double addrspace(13)* %36 to i64
Illegal inttoptr
%56 = inttoptr i64 %55 to i8 addrspace(13)*

signal (6): Aborted
in expression starting at none:0
gsignal at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x7f9f0a769d04)
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
unknown function (ip: 0x7f9f0a853ac1)
unknown function (ip: 0x7f9f0a8562d8)
unknown function (ip: 0x7f9f0a8568cd)
unknown function (ip: 0x7f9f0a791b4a)
unknown function (ip: 0x7f9f0a7c2ed3)
unknown function (ip: 0x7f9f0a7e884b)
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
#346 at ./array.jl:0
iterate at ./generator.jl:47 [inlined]
indexed_iterate at ./tuple.jl:89 [inlined]
gr_add_series at /home/wesley/.julia/packages/Plots/uCh2y/src/backends/gr.jl:1491
gr_display at /home/wesley/.julia/packages/Plots/uCh2y/src/backends/gr.jl:891
unknown function (ip: 0x7f9eb12c1048)
gr_display at /home/wesley/.julia/packages/Plots/uCh2y/src/backends/gr.jl:596
_show at /home/wesley/.julia/packages/Plots/uCh2y/src/backends/gr.jl:1776
_showjuno at /home/wesley/.julia/packages/Plots/uCh2y/src/output.jl:273 [inlined]
showjuno at /home/wesley/.julia/packages/Plots/uCh2y/src/output.jl:257
show at /home/wesley/.julia/packages/Plots/uCh2y/src/output.jl:212
unknown function (ip: 0x7f9f0a7f3df8)
#base64encode#3 at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/encode.jl:208
base64encode##kw at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/encode.jl:203 [inlined]
_binstringmime at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/Base64.jl:46 [inlined]
#stringmime#6 at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/Base64.jl:43
stringmime##kw at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/Base64.jl:43
#stringmime#7 at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/Base64.jl:44
stringmime##kw at /build/julia-98cBbp/julia-1.4.1+dfsg/usr/share/julia/stdlib/v1.4/Base64/src/Base64.jl:44 [inlined]
displayinplotpane at /home/wesley/.julia/packages/Atom/BPtI0/src/display/showdisplay.jl:84
displayandrender at /home/wesley/.julia/packages/Atom/BPtI0/src/display/showdisplay.jl:131
#218 at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:191
unknown function (ip: 0x7f9f0a7f3df8)
jl_f__apply_latest at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
#invokelatest#1 at ./essentials.jl:712 [inlined]
invokelatest at ./essentials.jl:711 [inlined]
#216 at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:190
withpath at /home/wesley/.julia/packages/CodeTools/VsjEq/src/utils.jl:30
withpath at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:9
#215 at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:173 [inlined]
with_logstate at ./logging.jl:398
with_logger at ./logging.jl:505 [inlined]
#214 at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:172 [inlined]
hideprompt at /home/wesley/.julia/packages/Atom/BPtI0/src/repl.jl:127
macro expansion at /home/wesley/.julia/packages/Media/ItEPc/src/dynamic.jl:24 [inlined]
evalall at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:162
unknown function (ip: 0x7f9f0a7f3df8)
jl_f__apply_latest at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
#invokelatest#1 at ./essentials.jl:712
unknown function (ip: 0x7f9f0a7f3df8)
invokelatest at ./essentials.jl:711
unknown function (ip: 0x7f9f0a7f3df8)
macro expansion at /home/wesley/.julia/packages/Atom/BPtI0/src/eval.jl:41 [inlined]
#184 at ./task.jl:358
unknown function (ip: 0x7f9eec0479ac)
unknown function (ip: 0x7f9f0a800cbb)
unknown function (ip: (nil))
Allocations: 118696019 (Pool: 118600401; Big: 95618); GC: 104

Issue 2:
Hello,

so I found a hard crash of Julia from a small piece of code

using Random
a = reshape(shuffle(0:15), 4, 4)
b = reshape(transpose(a), 1, :)
circshift(b, -1))

And the resulting crash "report" is:

Illegal inttoptr
%uglygep88 = ptrtoint i8 addrspace(13)* %uglygep to i64
Illegal inttoptr
%scevgep8990 = ptrtoint i64 addrspace(13)* %scevgep89 to i64
Illegal inttoptr
%215 = inttoptr i64 %214 to i8 addrspace(13)*
Illegal inttoptr
%umax9192 = inttoptr i64 %umax91 to i64 addrspace(13)*

signal (6): Aborted
in expression starting at /home/paul/test.jl:4
gsignal at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x7f98b857fd04)
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /usr/bin/../lib/x86_64-linux-gnu/libLLVM-8.so.1 (unknown line)
unknown function (ip: 0x7f98b8669ac1)
unknown function (ip: 0x7f98b866c2d8)
unknown function (ip: 0x7f98b866c8cd)
unknown function (ip: 0x7f98b85a7b4a)
unknown function (ip: 0x7f98b85d9082)
unknown function (ip: 0x7f98b85fe84b)
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
unknown function (ip: 0x7f98b861175b)
unknown function (ip: 0x7f98b8611389)
unknown function (ip: 0x7f98b86118f0)
unknown function (ip: 0x7f98b86129c8)
unknown function (ip: 0x7f98b8613616)
unknown function (ip: 0x7f98b862be08)
unknown function (ip: 0x7f98b8607105)
jl_load at /usr/bin/../lib/x86_64-linux-gnu/libjulia.so.1 (unknown line)
include at ./Base.jl:377
exec_options at ./client.jl:288
_start at ./client.jl:484
jfptr__start_2075.clone_1 at /usr/lib/x86_64-linux-gnu/julia/sys.so (unknown line)
unknown function (ip: 0x5585861d29d9)
unknown function (ip: 0x5585861d25a6)
__libc_start_main at /usr/bin/../lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x5585861d264d)
Allocations: 2505 (Pool: 2493; Big: 12); GC: 0
Aborted (core dumped)

versioninfo is:

Julia Version 1.4.1
Platform Info:
OS: Linux (x86_64-linux-gnu)
CPU: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-8.0.1 (ORCJIT, skylake)

Please let me know if I can help in any way!