Author serhiy.storchaka
Recipients Demur Rumed, Mark.Shannon, benjamin.peterson, brett.cannon, georg.brandl, ncoghlan, serhiy.storchaka, vstinner, yselivanov
Date 2016-06-10.07:48:39
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Message-id <1465544919.12.0.930460396524.issue27140@psf.upfronthosting.co.za>
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I have just tested. BUILD_CONST_KEY_MAP doesn't used in it, because at this time -0. still is not a constant, but an expression (negation of 0.). With -0 it doesn't work too.

$ ./python -m dis
{0: 1, 2: 3}
  1           0 LOAD_CONST               0 (1)
              2 LOAD_CONST               1 (3)
              4 LOAD_CONST               2 ((0, 2))
              6 BUILD_CONST_KEY_MAP      2
              8 POP_TOP
             10 LOAD_CONST               3 (None)
             12 RETURN_VALUE
$ ./python -m dis
{-0: 1, 2: 3}    
  1           0 LOAD_CONST               5 (0)
              2 LOAD_CONST               1 (1)
              4 LOAD_CONST               2 (2)
              6 LOAD_CONST               3 (3)
              8 BUILD_MAP                2
             10 POP_TOP
             12 LOAD_CONST               4 (None)
             14 RETURN_VALUE
History
Date User Action Args
2016-06-10 07:48:39serhiy.storchakasetrecipients: + serhiy.storchaka, brett.cannon, georg.brandl, ncoghlan, vstinner, benjamin.peterson, Mark.Shannon, yselivanov, Demur Rumed
2016-06-10 07:48:39serhiy.storchakasetmessageid: <1465544919.12.0.930460396524.issue27140@psf.upfronthosting.co.za>
2016-06-10 07:48:39serhiy.storchakalinkissue27140 messages
2016-06-10 07:48:39serhiy.storchakacreate