Mercurial > cpython-lru_cache-weakref
diff Python/compile.c @ 44928:69c5703d20fb legacy-trunk
#1920: when considering a block starting by "while 0", the compiler optimized the
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.
| author | Amaury Forgeot d'Arc <amauryfa@gmail.com> |
|---|---|
| date | Thu, 24 Jan 2008 22:51:18 +0000 |
| parents | 0ad12c79af18 |
| children | 1c9ac00c4758 |
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--- a/Python/compile.c Thu Jan 24 21:47:56 2008 +0000 +++ b/Python/compile.c Thu Jan 24 22:51:18 2008 +0000 @@ -1598,8 +1598,11 @@ basicblock *loop, *orelse, *end, *anchor = NULL; int constant = expr_constant(s->v.While.test); - if (constant == 0) + if (constant == 0) { + if (s->v.While.orelse) + VISIT_SEQ(c, stmt, s->v.While.orelse); return 1; + } loop = compiler_new_block(c); end = compiler_new_block(c); if (constant == -1) {