Assertion during loading of precompile .ji

[Keno]

I'm seeing this assertion during precompile deserialization:

julia> using Revise

julia> using XLA
[ Info: Recompiling stale cache file /home/keno/.julia/compiled/v1.1/XLA/qVZMu.ji for XLA [62031404-ea4d-59fc-b017-b9812f5c6528]
┌ Warning: Package XLA does not have LinearAlgebra in its dependencies:
│ - If you have XLA checked out for development and have
│   added LinearAlgebra as a dependency but haven't updated your primary
│   environment's manifest file, try `Pkg.resolve()`.
│ - Otherwise you may need to report an issue with XLA
└ Loading LinearAlgebra into XLA from project dependency, future warnings for XLA are suppressed.
julia-debug: /home/keno/julia-1.0/src/julia.h:765: jl_svecref: Assertion `i < jl_svec_len(t)' failed.

The backtrace is:

#4  0x00007f7f8b4d4222 in jl_svecref (t=0x7f7f78924010, i=0) at /home/keno/julia-1.0/src/julia.h:765
#5  0x00007f7f8b4d5433 in jl_intref (arr=0x7f7f78924008, idx=1) at /home/keno/julia-1.0/src/typemap.c:182
#6  0x00007f7f8b4d57f2 in mtcache_hash_lookup (a=0x7f7eef4e06d0, ty=0x7f7f7df1c0f0 <jl_system_image_data+528240>, tparam=0 '\000',
    offs=0 '\000') at /home/keno/julia-1.0/src/typemap.c:251
#7  0x00007f7f8b4d68e6 in jl_typemap_intersection_visitor (map=0x7f7eef4e06d0, offs=0, closure=0x7f7f5dffd510)
    at /home/keno/julia-1.0/src/typemap.c:542
#8  0x00007f7f8b4d0bb8 in jl_method_table_insert (mt=0x7f7f7df1c1b0 <jl_system_image_data+528432>, method=0x7f7ef13664f0,
    simpletype=0x7f7f78924008) at /home/keno/julia-1.0/src/gf.c:1612
#9  0x00007f7f8b50099d in jl_insert_methods (list=0x56176a640cc0) at /home/keno/julia-1.0/src/dump.c:2174
#10 0x00007f7f8b504777 in _jl_restore_incremental (f=0x7f7f5dffd7f0, mod_array=0x7f7f7b2630f0)
    at /home/keno/julia-1.0/src/dump.c:3104
#11 0x00007f7f8b504a5a in jl_restore_incremental (fname=0x7f7f7a777058 "/home/keno/.julia/compiled/v1.1/XLA/qVZMu.ji",
    mod_array=0x7f7f7b2630f0) at /home/keno/julia-1.0/src/dump.c:3149
#12 0x00007f7f64e6632b in japi1__include_from_serialized_2109732566 (path=<optimized out>, depmods=<optimized out>)
    at loading.jl:617

The ->indices ordered dict is not yet initialized because we're deserializing (i.e. it's jl_nothing).
The method it's trying to invalidate backedges for is from the package we're currently deserializing:

#8  0x00007f7f8b4d0bb8 in jl_method_table_insert (mt=0x7f7f7df1c1b0 <jl_system_image_data+528432>, method=0x7f7ef13664f0,
    simpletype=0x7f7f78924008) at /home/keno/julia-1.0/src/gf.c:1612
1612	                jl_typemap_intersection_visitor(d[i]->specializations, 0, &env.match);
(rr) list
1607	        else {
1608	            assert(jl_is_array(oldvalue));
1609	            jl_method_t **d = (jl_method_t**)jl_array_ptr_data(oldvalue);
1610	            size_t i, n = jl_array_len(oldvalue);
1611	            for (i = 0; i < n; i++) {
1612	                jl_typemap_intersection_visitor(d[i]->specializations, 0, &env.match);
1613	            }
1614	        }
1615	    }
1616	    if (env.invalidated && JL_DEBUG_METHOD_INVALIDATION) {
(rr) p jl_(d[i])
XLA.convert(...)