[Python-3000] RELEASED Python 2.6a2 and 3.0a4

Marcin ‘Qrczak’ Kowalczyk qrczak at knm.org.pl
Sun Apr 6 15:58:47 CEST 2008

Dnia 06-04-2008, nie o godzinie 15:23 +0200, "Martin v. Löwis" pisze:

> What operating system and compiler? Does the behaviour change if you
> compile without optimization?

You are right, this is a gcc bug. Python built with OPT=-O0 passed to
configure. This is Linux/athlon, gcc-4.3.0 snapshot from 2008-03-13.

Since I recently encountered a particular gcc-4.3.0 bug,
I confirmed that it is the cause here too: Python-3.0a4 builds
with "-O3 -fwrapv -fno-tree-vrp" but hangs with "-O3 -fwrapv".
The bug is already fixed in gcc:

The bug is present in gcc-4.3.0 released a month ago, so someone with
vanilla gcc-4.3.0 might check this. Adding -fno-tree-vrp is a workaround
for gcc-4.3.0.

   __("<         Marcin Kowalczyk
   \__/       qrczak at knm.org.pl
    ^^     http://qrnik.knm.org.pl/~qrczak/

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