SIC and blocks

$ yapsi -e '{{}; my $a = 5; { say $a }; say $a; { say $a; {}; }}; {}'

SIC emitted for this:

This is SIC v2010.05

block 'main':
    `lexicals: <>
    $0 = fetch-block 'main_1'
    call $0
    $1 = fetch-block 'main_6'
    call $1

block 'main_1':
    `lexicals: <$a>
    $0 = fetch-block 'main_1_2'
    call $0
    $1 = 5
    store '$a', $1
    $2 = fetch-block 'main_1_3'
    call $2
    $3 = fetch '$a'
    say $3
    $4 = fetch-block 'main_1_4'
    call $4

block 'main_1_2':
    `lexicals: <>

block 'main_1_3':
    `lexicals: <>
    $0 = fetch '$a'
    say $0

block 'main_1_4':
    `lexicals: <>
    $0 = fetch '$a'
    say $0
    $1 = fetch-block 'main_1_4_5'
    call $1

block 'main_1_4_5':
    `lexicals: <>

block 'main_6':
    `lexicals: <>


Result of running the above:

5
5
5