On 20/03/2016 20:59, Jonathan Wakely wrote:
> On 20 March 2016 at 18:54, Nicholas Mc Guire wrote:
>
>> during some compiler testing to determin the impact of individual flags
>> on the layout of binaries I扉e been doing brute force iterations over
>> flags and stubled accross the following "internal compiler error"
>>
>> This happens with:
>> * gcc (Debian 4.7.2-5) 4.7.2 on Debian 7.6
>> * gcc (Debian 4.9.2-10) 4.9.2 on Debian 8.1
>>
>> hofrat@debian:~/Diversity/testing$ cat hello.c
>> #include <stdio.h>
>>
>> int main(int argc, char **argv) {
>> printf("hello, world\n");
>> return 0;
>> }
>> hofrat@debian:~/Diversity/testing$ gcc -fshort-double hello.c -c -o hello.o
>> <built-in>:0:0: internal compiler error: in layout_type, at stor-layout.c:2121
>> Please submit a full bug report,
>> with preprocessed source if appropriate.
>> See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
>> Preprocessed source stored into /tmp/ccbpCZZY.out file, please attach this to your bugreport.
>>
>> checking http://gcc.gnu.org/bugs.html#known it did not seem that this
>> qualifies as one of the known FP Non-bugs.
>
> That page only lists some very frequently reported issues (and
> non-issues). You need to search bugzilla to see if it's known.
I tried searching for stor-layout.c:2121 in comments, but Bugzilla just
hung for hours. Searching for stor-layout.c in the summary returns:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63882
>> Should this be reported or is this just an absurd commanline here ?
>> (all other single flags pass - some with legitimate warnings)
>
> All internal compiler errors are bugs, always. The compiler should
> never crash on invalid input or invalid command lines, it should give
> an error.
Here's a shorter test case, which ICEs even on empty source.
$ echo | gcc -x c -fshort-double -
<built-in>:0:0: internal compiler error: in layout_type, at stor-layout.c:2136
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04)
Regards.
