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g++/c++ 2.7.2.2 Internal Compiler Error 40

From: Thomas Mueller <tomtom.mueller@gmx.de>
Date: Tue, 26 Oct 2004 14:12:55 +0700
Message-ID: <001701c4bb2b$5eb64d50$fb78fea9@bigmac>
To: "w3c-wai-rc lists.w3.org" <w3c-wai-rc@w3.org>
DESCRIPTION:

    g++/c++ generates an "Internal Compiler Error 40" when compiling
code which attempts a catch-by-value for exception classes derived
from any base classes which have destructors.

TEST CASE DESCRIPTION:

    The code below defines a trivial base class exception (TBaseException), 
and an equally trivial derived exception (TDerivedException). A routine
for throwing the exceptions is defined (ThrowIt(int)), and two routines
for catching the exceptions are defined (CatchByReference(int), and
CatchByValue(int)). The compiler error is generated in the CatchByValue
routine at the catch clause for TDerivedException. If you comment out
the destructor for TBaseException the code will compile.

COMPILER COMMAND LINE:
   c++ GCC-BUG.C -o bug -fhandle-exceptions

COMPILER ERROR OUTPUT:  [sparc-sun-solaris2.5.1 configuration]

   GCC-BUG.C: In function `void CatchByValue(int)':
   GCC-BUG.C:135: Internal compiler error.
   GCC-BUG.C:135: Please submit a full bug report
COMPILER ERROR OUTPUT:  [i386-unknown-bsdi2.1 configuration]

   GCC-BUG.C: In function `void CatchByValue(int)':
   GCC-BUG.C:135: Internal compiler error 40.
   GCC-BUG.C:135: Please submit a full bug report 

CONFIGURATION INFO:
   gcc -v output:             gcc version 2.7.2.2  (both systems)
   configure architecture:    sparc-sun-solaris2.5.1
   configure architecture:    i386-unknown-bsdi2.1
   configure paramenters:     NONE on either system

COMPILER MODIFICATIONS:
   NONE - compilers were both built from the stock 2.7.2.2 distribution.

OTHER NOTES:
   I usually catch exceptions by reference, but there appears to be
a memory leak in g++/c++ when derived exceptions are caught this way. I
discovered the internal compiler error while looking for a quick and
dirty way to plug this leak.




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Received on Tuesday, 26 October 2004 07:14:48 GMT

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