Segfault from `map(x->parsehtml(String(x.body)), xs)`

[anandijain]

I'm assuming that it was just out of memory error, but Julia still crashed from segfault, so filing an issue.
The stacktrace is rather long, so I just included the start and end.

julia> versioninfo()
Julia Version 1.5.2
Commit 539f3ce943 (2020-09-23 23:17 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 4

julia> b = map(x->parsehtml(String(x.body)), a)
241-element Array{HTMLDocument,1}:

signal (11): Segmentation fault
in expression starting at none:0
page_metadata at /buildworker/worker/package_linux64/build/src/gc.h:448 [inlined]
gc_setmark_pool at /buildworker/worker/package_linux64/build/src/gc.c:751 [inlined]
gc_setmark at /buildworker/worker/package_linux64/build/src/gc.c:758 [inlined]
gc_mark_loop at /buildworker/worker/package_linux64/build/src/gc.c:2572
_jl_gc_collect at /buildworker/worker/package_linux64/build/src/gc.c:2902
jl_gc_collect at /buildworker/worker/package_linux64/build/src/gc.c:3108
maybe_collect at /buildworker/worker/package_linux64/build/src/gc.c:827 [inlined]
jl_gc_pool_alloc at /buildworker/worker/package_linux64/build/src/gc.c:1142
iterate at ./compiler/ssair/ir.jl:393
iterate at ./compiler/ssair/ir.jl:385 [inlined]
replace_code_newstyle! at ./compiler/ssair/legacy.jl:71
optimize at ./compiler/optimize.jl:220
typeinf at ./compiler/typeinfer.jl:33

unknown function (ip: (nil))
Allocations: 86180299 (Pool: 86152106; Big: 28193); GC: 96
fish: '/home/sippycups/julia-1.5.2/bin…' terminated by signal SIGSEGV (Address boundary error)

[aviks]

Is this sefault reproducible? If you can reliably reporoduct it, it would be great to get an RR trace of it. (https://julialang.org/blog/2020/05/rr/)