Random C testsuite failures for gcc-3_0-branch (i686-pc-linux-gnu)

[Andris Pavenis]

Sorry somehow errorously pressed send button to early ...

I'm getting some testsuite failures randomly appearing and disappearing when 
running GCC C testsuite (nightly bootstrapping and testing current CVS 
version of gcc-3.0 branch for i686-pc-linux-gnu). I rerun 'make check-gcc'
today and got different test results with same sources and binaries.

Andris

Source:   gcc 3.0 branch (last updated 2002 Jan 07  01:01  +0200)
System:   Linux kernel 2.4.17
          glibc-2.2.3
          binutils-2.11.90.0.31
          Pentium III, 512Mb RAM        

                === gcc tests ===


Running target unix
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O0 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O1 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O2 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O3 -fomit-frame-pointer 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O3 -g 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -Os 
FAIL: gcc.dg/format/c99-scanf-1.c %hhu sign (test for warnings, line 144)

                === gcc Summary ===

# of expected passes            15342
# of unexpected failures        1
# of unexpected successes       6
# of expected failures          77
# of unsupported tests          20
/disk2/cvs/gcc30/build/build.lnx/gcc/xgcc version 3.0.4 20020106 (prerelease) 

Later I rerun GCC tests once more and no more got failure for gcc/dg/format/c99-scanf-1.c.
Other results of  C tests where identical. I'm including diffs of log files of both runs of C testsuite 
in attachment

For example day before I got even more failures, but only source changes were in date in versions:
		=== gcc tests ===


Running target unix
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O0 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O1 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O2 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O3 -fomit-frame-pointer 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -O3 -g 
XPASS: gcc.c-torture/execute/20000801-4.c execution,  -Os 
FAIL: gcc.dg/format/c99-scanf-1.c %hhu sign (test for warnings, line 144)
FAIL: gcc.dg/format/c99-scanf-1.c (test for excess errors)
FAIL: gcc.dg/format/c99-scanf-1.c %hhu sign (test for warnings, line 144)
FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 111)
FAIL: gcc.dg/noncompile/920923-1.c (test for excess errors)

		=== gcc Summary ===

# of expected passes		15338
# of unexpected failures	5
# of unexpected successes	6
# of expected failures		77
# of unsupported tests		20
/disk2/cvs/gcc30/build/build.lnx/gcc/xgcc version 3.0.4 20020105 (prerelease)

Here are information about files updated between these 2 builds

Updating CVS tree
P gcc/version.c
P gcc/f/version.c
P libf2c/libF77/Version.c
P libf2c/libI77/Version.c
P libf2c/libU77/Version.c
P libstdc++-v3/include/bits/c++config
Adjusting file timestamps

So It really seems that some testsuite failures appears randomly

Andris

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