RUST Boxing of stack-allocated value

    .text
    .file   "rust_out.0.rs"
    .section    .text._ZN4main20h1b0ee7751a0669e4iaaE,"ax",@progbits
    .align  16, 0x90
    .type   _ZN4main20h1b0ee7751a0669e4iaaE,@function
_ZN4main20h1b0ee7751a0669e4iaaE:
    .cfi_startproc
    cmpq    %fs:112, %rsp
    ja  .LBB0_2
    movabsq $88, %r10
    movabsq $0, %r11
    callq   __morestack
    retq
.LBB0_2:
    pushq   %rbx
.Ltmp0:
    .cfi_def_cfa_offset 16
    subq    $80, %rsp
.Ltmp1:
    .cfi_def_cfa_offset 96
.Ltmp2:
    .cfi_offset %rbx, -16
    movl    $1, 72(%rsp)
    movq    _ZN3fmt3num16i32.fmt..Display3fmt20he8730d9eb37a86628NLE@GOTPCREL(%rip), %rax
    movq    %rax, 8(%rsp)
    leaq    72(%rsp), %rax
    movq    %rax, (%rsp)
    movups  _ZN4main15__STATIC_FMTSTR20h910e8b82b4c5a8feyaaE(%rip), %xmm0
    movaps  %xmm0, 16(%rsp)
    xorps   %xmm0, %xmm0
    movaps  %xmm0, 32(%rsp)
    leaq    (%rsp), %rax
    movq    %rax, 48(%rsp)
    movq    $1, 56(%rsp)
    leaq    16(%rsp), %rdi
    callq   _ZN2io5stdio6_print20h494510ac6720bf89aNhE@PLT
    movl    72(%rsp), %ebx
    movl    $4, %edi
    xorl    %esi, %esi
    callq   je_mallocx@PLT
    testq   %rax, %rax
    je  .LBB0_6
    movl    %ebx, (%rax)
    movabsq $2097865012304223517, %rcx
    cmpq    %rcx, %rax
    je  .LBB0_5
    movl    $4, %esi
    xorl    %edx, %edx
    movq    %rax, %rdi
    callq   je_sdallocx@PLT
.LBB0_5:
    addq    $80, %rsp
    popq    %rbx
    retq
.LBB0_6:
    callq   _ZN3oom20he7076b57c17ed7c6HYaE@PLT
.Ltmp3:
    .size   _ZN4main20h1b0ee7751a0669e4iaaE, .Ltmp3-_ZN4main20h1b0ee7751a0669e4iaaE
    .cfi_endproc

    .section    .text.main,"ax",@progbits
    .globl  main
    .align  16, 0x90
    .type   main,@function
main:
    .cfi_startproc
    movq    %rsi, %rax
    movq    %rdi, %rcx
    leaq    _ZN4main20h1b0ee7751a0669e4iaaE(%rip), %rdi
    movq    %rcx, %rsi
    movq    %rax, %rdx
    jmp _ZN2rt10lang_start20he050f8de3bcc02b7VRIE@PLT
.Ltmp4:
    .size   main, .Ltmp4-main
    .cfi_endproc

    .type   str1056,@object
    .section    .rodata.str1056,"a",@progbits
str1056:
    .size   str1056, 0

    .type   str1057,@object
    .section    .rodata.str1057,"a",@progbits
str1057:
    .byte   10
    .size   str1057, 1

    .type   ref31,@object
    .section    .data.rel.ro.local.ref31,"aw",@progbits
    .align  16
ref31:
    .quad   str1056
    .quad   0
    .quad   str1057
    .quad   1
    .size   ref31, 32

    .type   _ZN4main15__STATIC_FMTSTR20h910e8b82b4c5a8feyaaE,@object
    .section    .data.rel.ro.local._ZN4main15__STATIC_FMTSTR20h910e8b82b4c5a8feyaaE,"aw",@progbits
    .align  8
_ZN4main15__STATIC_FMTSTR20h910e8b82b4c5a8feyaaE:
    .quad   ref31
    .quad   2
    .size   _ZN4main15__STATIC_FMTSTR20h910e8b82b4c5a8feyaaE, 16


    .section    ".note.GNU-stack","",@progbits