Bug#960977: warning: $SAFE will become a normal global variable in Ruby 3.0

[Antonio Terceiro]

Package: ruby-netcdf
Version: 0.7.2-4+b1
Severity: important
Tags: upstream

Dear Maintainer,

The safe/taint mechanism was removed from Ruby in version 2.7. It's now
a no-op, and in Ruby 3.0 it will cause ruby-netcdf to crash.

For example, you can reproduce the issue with this command:

$ ruby -rnumru/netcdf -e 'puts NumRu::NetCDF.create_tmp'
/usr/lib/ruby/vendor_ruby/numru/netcdf.rb:144: warning: $SAFE will become a normal global variable in Ruby 3.0
#<NumRu::NetCDF:0x0000563aa3714fd8>

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (500, 'testing'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.6.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_CRAP
Locale: LANG=pt_BR.UTF-8, LC_CTYPE=pt_BR.UTF-8 (charmap=UTF-8), LANGUAGE=pt_BR:pt:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ruby-netcdf depends on:
ii  libc6             2.30-8
ii  libnetcdf18       1:4.7.4-1
ii  libruby2.7        2.7.1-3
ii  ruby              1:2.7+1
ii  ruby-narray       0.6.1.2-3+b2
ii  ruby-narray-miss  1.4.0-2

ruby-netcdf recommends no packages.

ruby-netcdf suggests no packages.

-- no debconf information
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