This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-04-13
1415. Missing prohibition of block-scope definition of extern objectSection: 6.6 [basic.link] Status: CD3 Submitter: Richard Smith Date: 2011-11-13[Moved to DR at the October, 2012 meeting.]
There does not appear to be wording that prohibits a block-scope extern object declaration from being a definition.
Proposed resolution (February, 2012):
Add the following as a new paragraph following 9.5 [dcl.init] paragraph 4:
[Note: Default arguments are more restricted; see 9.3.4.7 [dcl.fct.default].
The order of initialization of variables with static storage duration is described in 6.9.3 [basic.start] and 8.9 [stmt.dcl]. —end note]
A declaration of a block-scope variable with external or internal linkage that has an initializer is ill-formed.
To zero-initialize an object...
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