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* [Bug c/96554] New: -Wall does not include -Wnull-dereference
@ 2020-08-10 12:36 R.E.Wolff at BitWizard dot nl
2020-08-10 12:48 ` [Bug c/96554] " jakub at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: R.E.Wolff at BitWizard dot nl @ 2020-08-10 12:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
Bug ID: 96554
Summary: -Wall does not include -Wnull-dereference
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: R.E.Wolff at BitWizard dot nl
Target Milestone: ---
As reported in c/96550, the fact that -Wall didn't include -Wnull-dereference
cost me a lot of time in trying to figure out what the problem was with my
code.
I add -Wall to get lots of warnings about potential bugs. if (a = 3) is an
example where a simple typo in the code leads to perfectly valid C, but such a
"high likelyhood of a bug" that a warning is warranted.
Same here: I wrote a bug that caused the compiler to a) not warn me and b) do
unexpected things. I think the -Wnull-dreference is a valid warning to enable
with -Wall.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug c/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
@ 2020-08-10 12:48 ` jakub at gcc dot gnu.org
2020-08-10 13:02 ` R.E.Wolff at BitWizard dot nl
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-08-10 12:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This warning is intentionally not enabled at -Wall, because it has too many
false positives (technically correct warnings, but about dead code).
See e.g. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16351#c35
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug c/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
2020-08-10 12:48 ` [Bug c/96554] " jakub at gcc dot gnu.org
@ 2020-08-10 13:02 ` R.E.Wolff at BitWizard dot nl
2020-08-10 13:03 ` schwab@linux-m68k.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: R.E.Wolff at BitWizard dot nl @ 2020-08-10 13:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
--- Comment #2 from Roger Wolff <R.E.Wolff at BitWizard dot nl> ---
In my case it promotes a function I didn't declare as <does not return> into
one that <does not return> and thereby it caused 80% of my code to become
"dead". It'd be nice to differentiate between the case where a simple
optimization removes a few lines of code due to an extra null-check not being
reachable due to the trap on the null dereference and the case where big
unexpected things start happening.
Maybe the promotion of a function from "does return" to "does not return" is
something you might warn about. This satisfies the "you can easily modify the
code to silence the warning".
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug c/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
2020-08-10 12:48 ` [Bug c/96554] " jakub at gcc dot gnu.org
2020-08-10 13:02 ` R.E.Wolff at BitWizard dot nl
@ 2020-08-10 13:03 ` schwab@linux-m68k.org
2020-08-10 13:10 ` R.E.Wolff at BitWizard dot nl
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: schwab@linux-m68k.org @ 2020-08-10 13:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
*** Bug 96550 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug c/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
` (2 preceding siblings ...)
2020-08-10 13:03 ` schwab@linux-m68k.org
@ 2020-08-10 13:10 ` R.E.Wolff at BitWizard dot nl
2020-08-10 15:50 ` [Bug tree-optimization/96554] " msebor at gcc dot gnu.org
2020-08-10 18:56 ` rsandifo at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: R.E.Wolff at BitWizard dot nl @ 2020-08-10 13:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
--- Comment #4 from Roger Wolff <R.E.Wolff at BitWizard dot nl> ---
Update: LTO messes with the warning. When LTO is enabled, the warning from
-Wnull-dreference is suppressed.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug tree-optimization/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
` (3 preceding siblings ...)
2020-08-10 13:10 ` R.E.Wolff at BitWizard dot nl
@ 2020-08-10 15:50 ` msebor at gcc dot gnu.org
2020-08-10 18:56 ` rsandifo at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: msebor at gcc dot gnu.org @ 2020-08-10 15:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Last reconfirmed| |2020-08-10
Component|c |tree-optimization
Blocks| |86172
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
The latest trunk of GCC 11 has over 700 distinct instances of the
-Wnull-dereference warning so some work is still needed before it can be
enabled in either -Wextra or -Wall. Here's the breakdown:
Diagnostic Count Unique Files
-Wnull-dereference 3862 713 168
-Wimplicit-fallthrough= 4 1 1
-Wstringop-truncation 3 1 1
-Wreturn-local-addr 2 1 1
-Wmaybe-uninitialized 2 2 2
-Wnull-dereference Instances:
cc1plus: warning: potential null pointer dereference [-Wnull-dereference]
/src/gcc/trunk/gcc/analyzer/checker-path.cc:737
/src/gcc/trunk/gcc/analyzer/checker-path.cc:745
/src/gcc/trunk/gcc/analyzer/checker-path.cc:958
/src/gcc/trunk/gcc/analyzer/diagnostic-manager.cc:339
/src/gcc/trunk/gcc/analyzer/diagnostic-manager.cc:456
/src/gcc/trunk/gcc/analyzer/diagnostic-manager.cc:777
/src/gcc/trunk/gcc/analyzer/diagnostic-manager.cc:778
/src/gcc/trunk/gcc/analyzer/engine.cc:1844
/src/gcc/trunk/gcc/analyzer/engine.cc:2683
/src/gcc/trunk/gcc/analyzer/engine.cc:3570
/src/gcc/trunk/gcc/analyzer/engine.cc:3656
/src/gcc/trunk/gcc/analyzer/engine.cc:834
/src/gcc/trunk/gcc/analyzer/exploded-graph.h:263
/src/gcc/trunk/gcc/analyzer/program-point.h:225
/src/gcc/trunk/gcc/analyzer/program-state.cc:134
/src/gcc/trunk/gcc/analyzer/program-state.cc:241
/src/gcc/trunk/gcc/analyzer/program-state.cc:266
/src/gcc/trunk/gcc/analyzer/program-state.cc:267
/src/gcc/trunk/gcc/analyzer/program-state.cc:472
/src/gcc/trunk/gcc/analyzer/program-state.cc:473
/src/gcc/trunk/gcc/analyzer/program-state.cc:488
/src/gcc/trunk/gcc/analyzer/program-state.cc:489
/src/gcc/trunk/gcc/analyzer/program-state.cc:514
/src/gcc/trunk/gcc/analyzer/program-state.cc:584
/src/gcc/trunk/gcc/analyzer/program-state.cc:585
/src/gcc/trunk/gcc/analyzer/region-model.cc:1486
/src/gcc/trunk/gcc/analyzer/region-model.cc:1571
/src/gcc/trunk/gcc/analyzer/region-model.cc:2126
/src/gcc/trunk/gcc/analyzer/region-model.cc:2606
/src/gcc/trunk/gcc/analyzer/region-model.cc:424
/src/gcc/trunk/gcc/analyzer/region-model.h:1195
/src/gcc/trunk/gcc/analyzer/region-model.h:121
/src/gcc/trunk/gcc/analyzer/region-model.h:129
/src/gcc/trunk/gcc/analyzer/region-model.h:1583
/src/gcc/trunk/gcc/analyzer/region-model.h:1587
/src/gcc/trunk/gcc/analyzer/region-model.h:484
/src/gcc/trunk/gcc/analyzer/region-model.h:869
/src/gcc/trunk/gcc/analyzer/region-model.h:882
/src/gcc/trunk/gcc/analyzer/region-model.h:912
/src/gcc/trunk/gcc/analyzer/state-purge.h:95
/src/gcc/trunk/gcc/analyzer/supergraph.cc:177
/src/gcc/trunk/gcc/analyzer/supergraph.cc:198
/src/gcc/trunk/gcc/analyzer/supergraph.cc:221
/src/gcc/trunk/gcc/analyzer/supergraph.cc:240
/src/gcc/trunk/gcc/analyzer/supergraph.h:106
/src/gcc/trunk/gcc/analyzer/supergraph.h:126
/src/gcc/trunk/gcc/analyzer/supergraph.h:132
/src/gcc/trunk/gcc/analyzer/supergraph.h:138
/src/gcc/trunk/gcc/analyzer/supergraph.h:144
/src/gcc/trunk/gcc/analyzer/supergraph.h:163
/src/gcc/trunk/gcc/auto-profile.c:1517
/src/gcc/trunk/gcc/bb-reorder.c:467
/src/gcc/trunk/gcc/bitmap.h:393
/src/gcc/trunk/gcc/bitmap.h:532
/src/gcc/trunk/gcc/bitmap.h:576
/src/gcc/trunk/gcc/bitmap.h:579
/src/gcc/trunk/gcc/caller-save.c:906
/src/gcc/trunk/gcc/calls.c:1960
/src/gcc/trunk/gcc/c/c-parser.c:4442
/src/gcc/trunk/gcc/c-family/c-ada-spec.c:1905
/src/gcc/trunk/gcc/c-family/c-attribs.c:3906
/src/gcc/trunk/gcc/c-family/c-common.c:721
/src/gcc/trunk/gcc/cfg.c:338
/src/gcc/trunk/gcc/cfgcleanup.c:2143
/src/gcc/trunk/gcc/cfgcleanup.c:2409
/src/gcc/trunk/gcc/cfgloop.c:332
/src/gcc/trunk/gcc/cfgloop.h:532
/src/gcc/trunk/gcc/cfgloop.h:541
/src/gcc/trunk/gcc/cfgrtl.c:1170
/src/gcc/trunk/gcc/cfgrtl.c:4358
/src/gcc/trunk/gcc/cfgrtl.c:443
/src/gcc/trunk/gcc/cfgrtl.c:530
/src/gcc/trunk/gcc/cgraphbuild.c:403
/src/gcc/trunk/gcc/cgraph.c:1971
/src/gcc/trunk/gcc/cgraph.c:2003
/src/gcc/trunk/gcc/cgraph.c:3089
/src/gcc/trunk/gcc/cgraph.c:3298
/src/gcc/trunk/gcc/cgraph.c:3848
/src/gcc/trunk/gcc/cgraph.c:3875
/src/gcc/trunk/gcc/cgraphclones.c:186
/src/gcc/trunk/gcc/cgraphclones.c:259
/src/gcc/trunk/gcc/cgraph.h:1350
/src/gcc/trunk/gcc/cgraph.h:1356
/src/gcc/trunk/gcc/cgraph.h:2189
/src/gcc/trunk/gcc/cgraph.h:246
/src/gcc/trunk/gcc/cgraph.h:2744
/src/gcc/trunk/gcc/cgraph.h:3097
/src/gcc/trunk/gcc/cgraph.h:3212
/src/gcc/trunk/gcc/cgraph.h:3250
/src/gcc/trunk/gcc/cgraph.h:3375
/src/gcc/trunk/gcc/cgraph.h:3376
/src/gcc/trunk/gcc/cgraph.h:3585
/src/gcc/trunk/gcc/cgraphunit.c:1419
/src/gcc/trunk/gcc/cgraphunit.c:2233
/src/gcc/trunk/gcc/cgraphunit.c:2339
/src/gcc/trunk/gcc/cgraphunit.c:626
/src/gcc/trunk/gcc/cgraphunit.c:627
/src/gcc/trunk/gcc/cgraphunit.c:630
/src/gcc/trunk/gcc/cgraphunit.c:635
/src/gcc/trunk/gcc/config/i386/i386.c:1214
/src/gcc/trunk/gcc/config/i386/i386.c:7698
/src/gcc/trunk/gcc/config/i386/i386-features.c:1102
/src/gcc/trunk/gcc/config/i386/i386-features.c:1120
/src/gcc/trunk/gcc/config/i386/i386-features.c:1121
/src/gcc/trunk/gcc/config/i386/i386-features.c:1556
/src/gcc/trunk/gcc/config/i386/i386-features.c:1557
/src/gcc/trunk/gcc/config/i386/i386-features.c:536
/src/gcc/trunk/gcc/config/i386/i386-features.c:537
/src/gcc/trunk/gcc/config/i386/i386-features.c:690
/src/gcc/trunk/gcc/config/i386/i386-features.c:910
/src/gcc/trunk/gcc/coverage.c:335
/src/gcc/trunk/gcc/coverage.c:642
/src/gcc/trunk/gcc/coverage.c:696
/src/gcc/trunk/gcc/cp/call.c:10483
/src/gcc/trunk/gcc/cp/call.c:10506
/src/gcc/trunk/gcc/cp/call.c:10803
/src/gcc/trunk/gcc/cp/call.c:10808
/src/gcc/trunk/gcc/cp/call.c:1512
/src/gcc/trunk/gcc/cp/call.c:7692
/src/gcc/trunk/gcc/cp/call.c:7746
/src/gcc/trunk/gcc/cp/constexpr.c:4003
/src/gcc/trunk/gcc/cp/constraint.cc:1141
/src/gcc/trunk/gcc/cp/constraint.cc:1142
/src/gcc/trunk/gcc/cp/constraint.cc:1146
/src/gcc/trunk/gcc/cp/constraint.cc:1148
/src/gcc/trunk/gcc/cp/constraint.cc:2206
/src/gcc/trunk/gcc/cp/constraint.cc:782
/src/gcc/trunk/gcc/cp/cp-tree.h:1530
/src/gcc/trunk/gcc/cp/cp-tree.h:1537
/src/gcc/trunk/gcc/cp/cp-tree.h:731
/src/gcc/trunk/gcc/cp/decl2.c:5076
/src/gcc/trunk/gcc/cp/decl.c:402
/src/gcc/trunk/gcc/cp/decl.c:8193
/src/gcc/trunk/gcc/cp/decl.c:935
/src/gcc/trunk/gcc/cp/decl.c:936
/src/gcc/trunk/gcc/cp/parser.c:20725
/src/gcc/trunk/gcc/cp/parser.c:20726
/src/gcc/trunk/gcc/cp/parser.c:20727
/src/gcc/trunk/gcc/cp/parser.c:31572
/src/gcc/trunk/gcc/cp/pt.c:10709
/src/gcc/trunk/gcc/cp/pt.c:13546
/src/gcc/trunk/gcc/cp/pt.c:27962
/src/gcc/trunk/gcc/cp/pt.c:6241
/src/gcc/trunk/gcc/cp/pt.c:6242
/src/gcc/trunk/gcc/cp/pt.c:7107
/src/gcc/trunk/gcc/cp/tree.c:3780
/src/gcc/trunk/gcc/df.h:1198
/src/gcc/trunk/gcc/df.h:1207
/src/gcc/trunk/gcc/df.h:672
/src/gcc/trunk/gcc/df-problems.c:1391
/src/gcc/trunk/gcc/df-problems.c:1909
/src/gcc/trunk/gcc/df-problems.c:216
/src/gcc/trunk/gcc/df-problems.c:2767
/src/gcc/trunk/gcc/df-problems.c:4394
/src/gcc/trunk/gcc/df-problems.c:777
/src/gcc/trunk/gcc/df-scan.c:1483
/src/gcc/trunk/gcc/df-scan.c:2453
/src/gcc/trunk/gcc/df-scan.c:2502
/src/gcc/trunk/gcc/df-scan.c:2503
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/src/gcc/trunk/gcc/df-scan.c:2507
/src/gcc/trunk/gcc/df-scan.c:2508
/src/gcc/trunk/gcc/df-scan.c:2509
/src/gcc/trunk/gcc/df-scan.c:2510
/src/gcc/trunk/gcc/df-scan.c:2511
/src/gcc/trunk/gcc/df-scan.c:2512
/src/gcc/trunk/gcc/df-scan.c:269
/src/gcc/trunk/gcc/df-scan.c:270
/src/gcc/trunk/gcc/df-scan.c:3602
/src/gcc/trunk/gcc/df-scan.c:3767
/src/gcc/trunk/gcc/dominance.c:1502
/src/gcc/trunk/gcc/dumpfile.c:1505
/src/gcc/trunk/gcc/dumpfile.c:1582
/src/gcc/trunk/gcc/dumpfile.c:1593
/src/gcc/trunk/gcc/dumpfile.c:1609
/src/gcc/trunk/gcc/dwarf2out.c:10539
/src/gcc/trunk/gcc/dwarf2out.c:17468
/src/gcc/trunk/gcc/dwarf2out.c:17564
/src/gcc/trunk/gcc/dwarf2out.c:22577
/src/gcc/trunk/gcc/dwarf2out.c:30385
/src/gcc/trunk/gcc/dwarf2out.c:30419
/src/gcc/trunk/gcc/dwarf2out.c:6498
/src/gcc/trunk/gcc/emit-rtl.c:3759
/src/gcc/trunk/gcc/except.c:2015
/src/gcc/trunk/gcc/except.c:693
/src/gcc/trunk/gcc/fibonacci_heap.c:127
/src/gcc/trunk/gcc/fibonacci_heap.c:154
/src/gcc/trunk/gcc/fibonacci_heap.c:76
/src/gcc/trunk/gcc/fibonacci_heap.c:83
/src/gcc/trunk/gcc/gcov.c:2192
/src/gcc/trunk/gcc/gcov.c:2193
/src/gcc/trunk/gcc/gcov.c:2194
/src/gcc/trunk/gcc/gcov.c:2228
/src/gcc/trunk/gcc/gcov.c:2229
/src/gcc/trunk/gcc/gcov.c:2230
/src/gcc/trunk/gcc/genattrtab.c:4298
/src/gcc/trunk/gcc/gengtype.c:4559
/src/gcc/trunk/gcc/gengtype.c:4592
/src/gcc/trunk/gcc/gengtype.c:4625
/src/gcc/trunk/gcc/gengtype.c:4666
/src/gcc/trunk/gcc/genmatch.c:1461
/src/gcc/trunk/gcc/genmatch.c:2346
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/src/gcc/trunk/gcc/genmatch.c:3764
/src/gcc/trunk/gcc/genmatch.c:467
/src/gcc/trunk/gcc/genrecog.c:1587
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/src/gcc/trunk/gcc/genrecog.c:949
/src/gcc/trunk/gcc/gensupport.c:1080
/src/gcc/trunk/gcc/ggc-common.c:1004
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/src/gcc/trunk/gcc/gimple-loop-interchange.cc:1989
/src/gcc/trunk/gcc/gimple-loop-versioning.cc:287
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/src/gcc/trunk/gcc/haifa-sched.c:3864
/src/gcc/trunk/gcc/haifa-sched.c:5071
/src/gcc/trunk/gcc/haifa-sched.c:5477
/src/gcc/trunk/gcc/haifa-sched.c:5507
/src/gcc/trunk/gcc/haifa-sched.c:8838
/src/gcc/trunk/gcc/hash-map-tests.c:140
/src/gcc/trunk/gcc/hash-map-tests.c:141
/src/gcc/trunk/gcc/hash-map-tests.c:142
/src/gcc/trunk/gcc/hash-map-tests.c:143
/src/gcc/trunk/gcc/hash-map-tests.c:144
/src/gcc/trunk/gcc/hash-map-tests.c:145
/src/gcc/trunk/gcc/hash-map-tests.c:296
/src/gcc/trunk/gcc/hash-map-tests.c:69
/src/gcc/trunk/gcc/hash-map-tests.c:70
/src/gcc/trunk/gcc/hash-map-tests.c:71
/src/gcc/trunk/gcc/hash-map-tests.c:72
/src/gcc/trunk/gcc/hash-map-tests.c:73
/src/gcc/trunk/gcc/hash-map-tests.c:74
/src/gcc/trunk/gcc/hash-map-traits.h:50
/src/gcc/trunk/gcc/hash-map-traits.h:75
/src/gcc/trunk/gcc/hash-set.h:120
/src/gcc/trunk/gcc/hash-table.h:1141
/src/gcc/trunk/gcc/hash-table.h:541
/src/gcc/trunk/gcc/ifcvt.c:2164
/src/gcc/trunk/gcc/ifcvt.c:2192
/src/gcc/trunk/gcc/ifcvt.c:3010
/src/gcc/trunk/gcc/ipa-comdats.c:174
/src/gcc/trunk/gcc/ipa-comdats.c:195
/src/gcc/trunk/gcc/ipa-comdats.c:369
/src/gcc/trunk/gcc/ipa-comdats.c:374
/src/gcc/trunk/gcc/ipa-cp.c:2810
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/src/gcc/trunk/gcc/varpool.c:439
/src/gcc/trunk/gcc/varpool.c:542
/src/gcc/trunk/gcc/var-tracking.c:2101
/src/gcc/trunk/gcc/var-tracking.c:2140
/src/gcc/trunk/gcc/var-tracking.c:2161
/src/gcc/trunk/gcc/var-tracking.c:2550
/src/gcc/trunk/gcc/var-tracking.c:7134
/src/gcc/trunk/gcc/vec.c:136
/src/gcc/trunk/gcc/vec.c:137
/src/gcc/trunk/gcc/vec.c:138
/src/gcc/trunk/gcc/vec.c:153
/src/gcc/trunk/gcc/vec.h:1010
/src/gcc/trunk/gcc/vec.h:1011
/src/gcc/trunk/gcc/vec.h:1296
/src/gcc/trunk/gcc/vec.h:1297
/src/gcc/trunk/gcc/vec.h:1298
/src/gcc/trunk/gcc/vec.h:1416
/src/gcc/trunk/gcc/vec.h:1422
/src/gcc/trunk/gcc/vec.h:1444
/src/gcc/trunk/gcc/vec.h:1450
/src/gcc/trunk/gcc/vec.h:1866
/src/gcc/trunk/gcc/vec.h:579
/src/gcc/trunk/gcc/vec.h:878
/src/gcc/trunk/gcc/vec.h:889
/src/gcc/trunk/gcc/vec.h:904
/src/gcc/trunk/gcc/vec.h:919
/src/gcc/trunk/libcpp/include/line-map.h:589
/src/gcc/trunk/libcpp/macro.c:1588
/src/gcc/trunk/libcpp/macro.c:2079
/src/gcc/trunk/libcpp/macro.c:2117
/src/gcc/trunk/libiberty/cp-demangle.c:2457
/src/gcc/trunk/libiberty/cp-demangle.c:2657
/src/gcc/trunk/libiberty/cp-demangle.c:2662
/src/gcc/trunk/libiberty/cp-demangle.c:2667
/src/gcc/trunk/libiberty/cp-demangle.c:2672
/src/gcc/trunk/libiberty/cp-demangle.c:2677
/src/gcc/trunk/libiberty/cp-demangle.c:2682
/src/gcc/trunk/libiberty/cp-demangle.c:2687
/src/gcc/trunk/libiberty/cp-demangle.c:2693
/src/gcc/trunk/libiberty/cp-demangle.c:2694
/src/gcc/trunk/libiberty/cp-demangle.c:2713
/src/gcc/trunk/libiberty/obstack.c:210
/src/gcc/trunk/libiberty/obstack.c:211
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86172
[Bug 86172] [meta-bug] issues with -Wnull-dereference
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug tree-optimization/96554] -Wall does not include -Wnull-dereference
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
` (4 preceding siblings ...)
2020-08-10 15:50 ` [Bug tree-optimization/96554] " msebor at gcc dot gnu.org
@ 2020-08-10 18:56 ` rsandifo at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rsandifo at gcc dot gnu.org @ 2020-08-10 18:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96554
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #5)
> The latest trunk of GCC 11 has over 700 distinct instances of the
> -Wnull-dereference warning so some work is still needed before it can be
> enabled in either -Wextra or -Wall. Here's the breakdown:
It'd be interesting to know how many would still be caught by a
“must” version of the option, if it was split into a may/must pair
(as per earlier suggestions in Wnull-dereference). Maybe we could
emulate that by sticking in a postdominannce test and rerunning
the numbers…
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-08-10 18:56 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-10 12:36 [Bug c/96554] New: -Wall does not include -Wnull-dereference R.E.Wolff at BitWizard dot nl
2020-08-10 12:48 ` [Bug c/96554] " jakub at gcc dot gnu.org
2020-08-10 13:02 ` R.E.Wolff at BitWizard dot nl
2020-08-10 13:03 ` schwab@linux-m68k.org
2020-08-10 13:10 ` R.E.Wolff at BitWizard dot nl
2020-08-10 15:50 ` [Bug tree-optimization/96554] " msebor at gcc dot gnu.org
2020-08-10 18:56 ` rsandifo at gcc dot gnu.org
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