Hi, when I am running gcc test suite
$ make check-gcc RUNTESTFLAGS='-all ubsan.exp=float-cast-overflow-2.c'
=== gcc tests ===
Schedule of variations:
unix
Running target unix
Using /usr/share/dejagnu/baseboards/unix.exp as board description file
for target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for
target.
Using /home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/config/default.exp
as tool-and-target-specific interface file.
Running
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/gcc.dg/ubsan/ubsan.exp ...
PASS: c-c++-common/ubsan/float-cast-overflow-2.c -O0 (test for excess
errors)
PASS: c-c++-common/ubsan/float-cast-overflow-2.c -O0 execution test
FAIL: c-c++-common/ubsan/float-cast-overflow-2.c -O0 output pattern test
PASS: c-c++-common/ubsan/float-cast-overflow-2.c -O1 (test for
...
I am getting spurious FAILs. Rerunning the same tests might come up
with more or less FAILs / PASSes.
The tests have "lots" of dg-output directives
$ cat gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c | tail -n 3
/* { dg-output "\[^\n\r]*runtime error: value -?nan is outside the range
of representable values of type '__int128
unsigned'\[^\n\r]*(\n|\r\n|\r)" } */
/* { dg-output "\[^\n\r]*runtime error: value inf is outside the range
of representable values of type '__int128
unsigned'\[^\n\r]*(\n|\r\n|\r)" } */
/* { dg-output "\[^\n\r]*runtime error: value -inf is outside the range
of representable values of type '__int128 unsigned'" } */
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/testsuite/c-c%2B%2B-common/ubsan/float-cast-overflow-2.c?revision=212755&view=markup#l1
In the according log file, some of the "PASS..." output is messed up
with the output from dg-output, making the test fail:
$ cat testsuite/gcc/gcc.log
PASS: c-c++-common/ubsan/float-cast-overflow-2.c -O0 (test for excess
errors)
Setting LD_LIBRARY_PATH to : [cut]
spawn [open ...]
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c:20:3:
runtime error: value 1.70141e+38 is outside the range of representable
values of type '__int128'
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c:20:3:
runtime error: value 1.70141e+38 is outside the range of representable
values of type '__int128'
[...]
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c:25:3:
runtime error: value 3.40282e+38 is outside the range of representable
values of type '__int128 unsigned'
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c:25:3:
runtime error: value 3.40282e+38 is outside the range of representable
values of type '__int128 unsigned'
/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-2.c:25:3:
runtime error: PASS: c-c++-common/ubsan/float-cast-overflow-2.c -O0
execution test
BUMMER! The PASS output comes at the wrong place and messes up the dg-output
FAIL: c-c++-common/ubsan/float-cast-overflow-2.c -O0 output pattern test
Output was:
c-c++-common/ubsan/float-cast-overflow-2.c:20:3: runtime error: value
1.70141e+38 is outside the range of representable values of type '__int128'
c-c++-common/ubsan/float-cast-overflow-2.c:20:3: runtime error: value
1.70141e+38 is outside the range of representable values of type '__int128'
[...]
c-c++-common/ubsan/float-cast-overflow-2.c:25:3: runtime error: value
3.40282e+38 is outside the range of representable values of type
'__int128 unsigned'
c-c++-common/ubsan/float-cast-overflow-2.c:25:3: runtime error: value
3.40282e+38 is outside the range of representable values of type
'__int128 unsigned'
c-c++-common/ubsan/float-cast-overflow-2.c:25:3: runtime error:
Should match:
Output is missing after "runtime error: " which is the place where the
"PASS" message was emit.
Any ideas what can cause such fails? It's on a 8-core x86_64 machine,
but the testsuite is not started in parallel mode.
$ runtest -version
Expect version is 5.45
Tcl version is 8.6
Framework version is 1.5.3
Does this ring a bell somewhere? What could shred the output?
Thanks in advance,
Johann
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