This occurs with the j903 beta as well as:
Engine: j902/j64avx2/linux
Release-a: commercial/2020-12-05T11:14:22
Library: 9.02.08
Platform: Linux 64
Installer: J902 install
NB. a single line is fine
f =: {{ {{ 'x' }} y }}
f
3 : '{{ ''x'' }} y '
f 1
x
NB. a linebreak before the literal is fine
f =: {{ {{
'x' }} y }}
f
3 : (123 123 32 10 39 120 39 32 32 125 125 32 121 32{a.)
f 1
x
NB. a linebreak after the literal is not fine
f =: {{ {{ 'x'
}} y }}
f 1
x
f
Segmentation fault (core dumped)
f =: 3 : 0
{{
'x'
}} y
)
f
Segmentation fault (core dumped)
NB. more realistic example
f =: {{
{{ (>x),':',>y
}}/;:y
}}
f 'a b c'
a:b:c
f
Segmentation fault (core dumped)
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