Bug 235008
| Summary: | Bad compilation error message when on casting a constant pointer | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | cb <cyrilbesse1> | ||||
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||
| Status: | CLOSED ERRATA | QA Contact: | |||||
| Severity: | low | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 4.0 | CC: | aoliva | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | i386 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | RHBA-2007-0803 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2007-11-15 16:08:48 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Can you please confirm what version of GCC you're using? I haven't been able to duplicate this with the U4 gcc: $ g++ -v Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux Thread model: posix gcc version 3.4.6 20060404 (Red Hat 3.4.6-3) $ g++ bz235008.cc bz235008.cc: In function `void fct(const AA*)': bz235008.cc:16: error: static_cast from type `const AA*' to type `AB*' casts away constness I use a french gcc version. Moreover, I use a machine virutal (VMware) for launching Linux AS4. Perhaps thus the problem comes from their image. $ gcc -v Lecture des spcification partir de /usr/lib/gcc/i386-redhat-linux/3.4.6/specs Configur avec: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux Modle de thread: posix version gcc 3.4.6 20060404 (Red Hat 3.4.6-3) $ make bug_gcc g++ bug_gcc.cpp -o bug_gcc bug_gcc.cpp: In function `void fct(const AA*)': erreur interne au compilateur : routine de rapport d'erreur prempte. Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://bugzilla.redhat.com/bugzilla> for instructions. Preprocessed source stored into /tmp/ccuRsD9O.out file, please attach this to your bugreport. make: *** [bug_gcc] Erreur 1 (In reply to comment #1) > Can you please confirm what version of GCC you're using? I haven't been able to > duplicate this with the U4 gcc: > > $ g++ -v > Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs > Configured with: ../configure --prefix=/usr --mandir=/usr/share/man > --infodir=/usr/share/info --enable-shared --enable-threads=posix > --disable-checking --with-system-zlib --enable-__cxa_atexit > --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux > Thread model: posix > gcc version 3.4.6 20060404 (Red Hat 3.4.6-3) > $ g++ bz235008.cc > bz235008.cc: In function `void fct(const AA*)': > bz235008.cc:16: error: static_cast from type `const AA*' to type `AB*' casts > away constness > Created attachment 152512 [details]
gcc34-rh235008.patch
That's a translation bug.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2007-0803.html |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3 Description of problem: When I compile this code, I obtain an internal error of compiler. I whould like a simple error message. #include <assert.h> class AA { int i; }; class AB : public AA { public: int j; }; void fct(const AA* a) { const AB* p_ab = static_cast<AB *>(a); assert(p_ab->j == 2); } int main() { AB ab; ab.j = 2; fct(&ab); return 0; } Version-Release number of selected component (if applicable): gcc 3.4.6 How reproducible: Always Steps to Reproduce: 1.compile this code 2. 3. Actual Results: Please submit a full bug report ;-) Expected Results: An error message, for example: 'invalid convertion of " AB* " to " const AB* "' Additional info: For information, the correct line is: const AB* p_ab = static_cast<const AB *>(a);