[#STDCXX-754] [HP aCC 6.16] Potential null pointer dereference in cmdopt.cpp

C++ Standard Library

STDCXX-726

[HP aCC 6.16] Potential null pointer dereference in cmdopt.cpp

Created: 13/Mar/08 09:01 PM Updated: 23/Apr/08 12:06 AM

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Component/s:

Test Driver

Affects Version/s:

4.2.0

Fix Version/s:

4.2.2

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Remaining Estimate:

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Environment:

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$ uname -sr && aCC -V
HP-UX B.11.31
aCC: HP C/aC++ B3910B A.06.16 [Nov 26 2007]

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Dependants

This issue depends on:

STDCXX-889 [HP aCC 6.16] bogus warning #4276 on (-0x7fffffff - 1)

STDCXX-764 [HP aCC 6.16] bogus warning #20200 on trivially safe code

Description

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aCC -c -mt -I/amd/devco/scottz/stdcxx/4.2.x/include -I/build/scottz/12d/include -I/amd/devco/scottz/stdcxx/4.2.x/tests/include -AA +O2 +DD64
+w +W392 +W655 +W684 +W818 +W819 +W849 +W2193 +W2236 +W2261 +W2340 +W2401 +W2487 +W4227 +W4229 +W4231 +W4235 +W4237 +W4249 +W4255 +W4272 +W4284 +
W4285 +W4286 /amd/devco/scottz/stdcxx/4.2.x/tests/src/cmdopt.cpp

"/amd/devco/scottz/stdcxx/4.2.x/tests/src/cmdopt.cpp", line 537, procedure rw_vsetopts: warning #20200-D: Potential null pointer dereference through next is detected (null definition:/amd/devco/scottz/stdcxx/4.2.x/tests/src/cmdopt.cpp, line 506)

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Scott (Yu) Zhong added a comment - 31/Mar/08 04:51 AM

add compile line to description

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Martin Sebor added a comment - 23/Apr/08 12:03 AM

r650698 gets rid of one bogus warning only to replace it with another. The compiler now spits out the diagnostics below. Warning #4276 is caused by the compiler bug in STDCXX-889 and the new warning #20200 by the one in STDCXX-764.

aCC -c  -D_RWSTDDEBUG   -mt -I/amd/devco/sebor/stdcxx-4.2.x/include -I/build/sebor/stdcxx-4.2.x-aCC-6.16-15D//include -I/amd/devco/sebor/stdcxx-4.2.x/tests/include  -AA  -g +d  +DD64 +w +W392,655,684,818,819,849 +W2193,2236,2261,2340,2401,2487 +W4227,4229,4231,4235,4237,4249 +W4255,4272,4284,4285,4286,4296,4297 +W3348   /amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp
"/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp", line 167: warning #4276-D: 
          relational operator "<" always evaluates to 'false'
                 _RWSTD_INT_MIN < opt->minval_
                                ^

"/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp", line 181: warning #4276-D: 
          relational operator "<" always evaluates to 'false'
              if (_RWSTD_INT_MIN < opt->minval_)
                                 ^

"/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp", line 756: warning #4276-D: 
          relational operator "<" always evaluates to 'false'
                  && (   _RWSTD_INT_MIN < optspec->minval_
                                        ^

"/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp", line 1133: remark #4315-D: 
          while loop without body, did you insert an extra ';'?
                  while (isspace (*++s));
                                        ^

"/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp", line 513, procedure rw_vsetopts: warning #20200-D: 
          Potential null pointer dereference through end is detected (null
          definition:/amd/devco/sebor/stdcxx-4.2.x/tests/src/cmdopt.cpp, line
          506)

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Martin Sebor added a comment - 23/Apr/08 12:05 AM

Persistent warnings caused by compiler bugs described in STDCXX-764 and STDCXX-889.

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Martin Sebor added a comment - 23/Apr/08 12:06 AM

Lowered Priority and deferred until 4.2.2.