c++/10048: Compiler doesn't catch failure to return a value - causes crashing code

[cjc@cs.brown.edu]

>Number:         10048
>Category:       c++
>Synopsis:       Compiler doesn't catch failure to return a value - causes crashing code
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          accepts-illegal
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 12 20:36:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Christian Convey
>Release:        3.2.2
>Organization:
>Environment:
Interim Debian Linux build. Base kernel = 2.4.18
Athlon XP 1800+, 512 MB ram

gcc 3.2.2, built with:
--enable-shared --enable-threads --enable-long-long
Thread model: posix
>Description:
The code I've attached compiles without any complaint.

g++ x.C; a.out


However, if it's run unmodified, I get a crash.

I believe the error is that the compiler is willing to compile this code. Note that it does notice the code's problem when -Wall is used.
>How-To-Repeat:
Compile the code and run it.
>Fix:
Manually ensure that each function has a return statement for every path, or compile with -Wall.

>Release-Note:
>Audit-Trail:
>Unformatted:
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