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#1920: when considering a block starting by "while 0", the compiler optimized the

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whole construct away, even when an 'else' clause is present::

    while 0:
        print("no")
    else:
        print("yes")

did not generate any code at all.

Now the compiler emits the 'else' block, like it already does for 'if' statements.

Will backport.
This commit is contained in:
Amaury Forgeot d'Arc 2008-01-24 22:51:18 +00:00
parent 5310b69419
commit 16570f59ca
2 changed files with 13 additions and 1 deletions
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9
Lib/test/test_grammar.py
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@ -572,6 +572,15 @@ hello world
while 0: pass
else: pass
# Issue1920: "while 0" is optimized away,
# ensure that the "else" clause is still present.
x = 0
while 0:
x = 1
else:
x = 2
self.assertEquals(x, 2)
def testFor(self):
# 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite]
for i in 1, 2, 3: pass