c++/2178: ignoring of an unitialized reference error

[mik@usc.edu]

>Number:         2178
>Category:       c++
>Synopsis:       ignoring of an unitialized reference error
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 05 02:26:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Mikhail Dikovsky
>Release:        gcc version 2.95.2 20000220 (Debian GNU/Linux)
>Organization:
>Environment:
MACHTYPE=i386
HOSTTYPE=i386-linux
OSTYPE=linux
>Description:
The compiler does not complain about an erroneous code that
results in a reference being uninitialized. The file "a.cc"
compiles with no errors, although it should produce an error
message or a warning at least.
The problem occurs in the constuctor A(int&):
struct A
{
	int& num;
	A(int &Num) : num(num) {} 
	// Here we mistakenly initialize num with *itself* instead of Num.
};
>How-To-Repeat:
g++ -Wall a.cc
>Fix:
Add an error message or a warning.
>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Type: text/x-c++src; name="a.cc"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="a.cc"

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