bisectable6

query

my class A {}; my class B {}; my class C is B is A {}; multi f(A) { "A" }; multi f(B) { "B" }; sub g(A $x) { say f($x) }; g(C.new)  ## https://github.com/Raku/old-issue-tracker/issues/2874

result

¦«2015.12,2016.01.1,2016.02,2016.03,2016.04,2016.05,2016.06,2016.07.1,
  2016.08.1,2016.09,2016.10,2016.11,2016.12,2017.01»:
A

¦«2017.02,2017.03,2017.04.3,2017.05,2017.06,2017.07,2017.08,2017.09,
  2017.10,2017.11,2017.12»:
Ambiguous call to 'f'; these signatures all match:
:(A $)
:(B $)
  in sub g at /tmp/TF_9u0gH2J line 1
  in block <unit> at /tmp/TF_9u0gH2J line 1

 «exit code = 1»
¦«2018.01,2018.02.1,2018.03,2018.04.1,2018.05,2018.06,2018.08,2018.09,
  2018.10,2018.11,2018.12,2019.03.1,2019.07.1,2019.11,2020.01,2020.02.1,
  2020.05.1,2020.06,2020.07,2020.08.2»:
Ambiguous call to 'f(C)'; these signatures all match:
:(A $)
:(B $)
  in sub g at /tmp/TF_9u0gH2J line 1
  in block <unit> at /tmp/TF_9u0gH2J line 1

 «exit code = 1»
¦«2020.09,2020.10,2020.11,2020.12,2021.02.1,2021.03,2021.04,2021.05,
  2021.06,2021.07,2021.08,2021.09,2021.10,2021.12,2022.02,2022.03,2022.04,
  2022.06,2022.07,2022.12,HEAD(d824e6d)»:
Ambiguous call to 'f(C)'; these signatures all match:
  (A $)
  (B $)
  in sub g at /tmp/TF_9u0gH2J line 1
  in block <unit> at /tmp/TF_9u0gH2J line 1

 «exit code = 1»