perl -we 'my $x = `cat file1`' # seg faults

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perl -we 'my @x = `cat file1`' # works fine

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perl -we 'my $x = `cat file2`' # works fine

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perl -we 'my $x = `cat file2`; $x .= `cat file2`' # works fine

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perl -we 'my $x = `cat file2 file2`'

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Out of memory in perl:util:safesysmalloc (cygwin perl 5.40)

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Out of memory! (linux perl 5.38)

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Segmentation fault