[Bug binutils/27751] test failure on powerpc-linux-gnu

[efraim at flashner dot co.il]

https://sourceware.org/bugzilla/show_bug.cgi?id=27751

--- Comment #2 from Efraim Flashner <efraim at flashner dot co.il> ---
On Mon, Apr 19, 2021 at 02:51:30PM +0000, nickc at redhat dot com wrote:
> Hi Efraim,
> 
>   I am unable to reproduce these failures.  (As in, when I run the libiberty
> testsuite from the 2.36 branch, all of the tests pass).
> 
>   I suppose in theory it could be related to the version of gcc you are using
> to build libiberty.a.  I am using gcc 10.2.1 from Fedora 32.
> 
>   Do you have a copy of the gcc sources available ?  If so, can you try 
> running
> the libiberty testsuite from a build of those sources and see if it produces
> similar results.
> 
> Cheers
>   Nick
> 

I ran the tests a couple of times. The first time I tested the libiberty
from 10.4.0, 8.4.0 and 5.5.0 using Debian's gcc, 10.2.1. In all of those
the tests all passed. Then I ran it again using the gcc I used when the
tests failed, a statically linked gcc-5.5.0, using the saved environment
from the reported failure. Again all the tests passed in all the gcc
libiberty versions. (I realize that rust-test-demangle isn't in gcc-5.)

I then downloaded a fresh copy of binutils-2.36.1 and ran the test suite
for libiberty there using Debian's gcc-10.2.1.

(ins)efraim@g4:~/workspace/binutils-2.36.1/libiberty$ make check
make[1]: Entering directory
'/home/efraim/workspace/binutils-2.36.1/libiberty/testsuite'
gcc -DHAVE_CONFIG_H -g -O2  -I.. -I./../../include  -o test-demangle \
        ./test-demangle.c ../libiberty.a
./test-demangle < ./demangle-expected
./test-demangle: 347 tests, 0 failures
./test-demangle < ./d-demangle-expected
./test-demangle: 350 tests, 0 failures
./test-demangle < ./rust-demangle-expected
FAIL at line 222, options --format=rust:
in:  _RMCs4fqI2P2rA04_13const_genericINtB0_4CharKc76_E
out: <const_generic::Char<'
exp: <const_generic::Char<'v'>>
FAIL at line 285, options --format=auto:
in:  _RMCs4fqI2P2rA04_13const_genericINtB0_4CharKc76_E
out: <const_generic::Char<'
exp: <const_generic::Char<'v'>>
./test-demangle: 68 tests, 2 failures
make[1]: *** [Makefile:58: check-rust-demangle] Error 1
make[1]: Leaving directory
'/home/efraim/workspace/binutils-2.36.1/libiberty/testsuite'
make: *** [Makefile:504: check-subdir] Error 2

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