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Error The Address Of Will Never Be Null

With gcc-4.6.0 we get new warnings. For example, your method may — for reasons of backward compatibility — chose to return nil and log an error message in a method with a non-null return type when the ERROR: Error installing gherkin: ERROR: Failed to build gem native extension. /home/ben/.rvm/rubies/ree-1.8.7-2011.03/bin/ruby extconf.rb checking for main() in -lc... In these cases, you can suppress the analyzer warning with a cast: return (id _Nonnull)nil; Note that this cast does not affect code generation.

Beware of: SAFE_CMP(p++, p1++); share|improve this answer edited Jul 1 '10 at 3:40 Daniel Stutzbach 33.1k75968 answered Jul 1 '10 at 3:05 Matthew Flaschen 175k28368450 I think It's a I'm assuming that this is what you mean, and not disabling it in the official tagged release tarballs, but keeping it in master (for all CMAKE_BUILD_TYPE options)? However when I pass static pointer value using that macro, I want gcc not to check and produce such an annoyuing warning. Clean compile What happens instead?

contact us About About the Analyzer LLVM Project Clang Project Filing Bugs User Manual Obtaining the Analyzer Command Line Usage Using within Xcode Available Checks FAQ Source-level Annotations Development Checker Developer In the contrived example above, the analyzer has detected that the body of the loop is never entered for the case where length <= 0. Sameer & Alex, I support removing -Werror for release builds. int foo(int length) { int x = 0; assert(length > 0); for (int i = 0; i < length; i++) x += 1; return length/x; } Q: How can I suppress

Results logged to /home/ben/.rvm/gems/[email protected]/gems/gherkin-2.3.5/ext/gherkin_lexer_ar/gem_make.out Anybody got any ideas? You return nil only when the caller passes input documented to be invalid. C++ Information Tutorials Reference Articles Forum Forum BeginnersWindows ProgrammingUNIX/Linux ProgrammingGeneral C++ ProgrammingLoungeJobs Home page | Privacy policy©, 2000-2016 - All rights reserved - v3.1Spotted an error? From: Jonathan Wakely Index Nav: [DateIndex] [SubjectIndex] [AuthorIndex] [ThreadIndex] Message Nav: [DatePrev][DateNext] [ThreadPrev][ThreadNext] The request cannot be fulfilled by the server Skip to content Ignore Learn more Please note that

How can I tell it that the loop body will be entered at least once? However, in -Wall compliation switch that regards a warning as error, following codes are troublesome: int baz(struct foo *a) { struct foo b; ... In some cases, it may make sense for methods to intentionally violate nullability. If your class only uses an instance variable for part of its lifetime, it may maintain an invariant guaranteeing that the instance variable is always released before -dealloc.

I looked at this to see if I could figure out what was up and make a pull request, but it's (as you can see in the output) late where I When the analyzer sees that a value stored into a variable is never used, it is going to produce a message similar to this one: Instance variable 'commonName' in class 'HappyBird' Below is some terminal output. Reload to refresh your session.

This warning caused me some headache, and the (void*) cast trick may just save the day. –m01 Jul 18 '13 at 8:57 Incidentally, it looks like you can typecast This is free software; see the source for copying conditions. TH Is it reasonable to expect an exact sentence-for-sentence Spanish translation of English? yes creating Makefile make gcc -I. -I/opt/local/include -I. -I/home/ben/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/x86_64-linux -I. -fPIC -g -O2 -O0 -Wall -Werror -c gherkin_lexer_ar.c /Users/ahellesoy/scm/gherkin/tasks/../ragel/i18n/ar.c.rl: In function ‘CLexer_scan’: /Users/ahellesoy/scm/gherkin/tasks/../ragel/i18n/ar.c.rl:198:29: error: the comparison will always evaluate as ‘true’

In this case, you can silence a warning about a missing release by either adding assert(_ivar == nil) or an explicit release [_ivar release] (which will be a no-op when the Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox. You signed out in another tab or window. im using an online compiler so thats may be why i wasnt getting those warnings..thanks for showing them to me.

make -r chrome What is the expected result? This means you're really in (2).) If you're in (5), document it, then figure out if you're now in (2), (3), or (4). :-) Q: How do I tell the analyzer For example, you can modify the code segment as following. cmp(a,b) : 0 ...but personally, I would just create safe_cmp() as a function itself.

How do computers remember where they store things? Thank you. –cwyang Jul 1 '10 at 4:42 add a comment| up vote 0 down vote The gcc option -Wno-address seems to remove the warnings. Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc.

Here are the warnings my compiler reports about your code: main.cpp||In function ‘int main()’:| main.cpp|22|warning: unused variable ‘numm’ [-Wunused-variable]| main.cpp|24|warning: unused variable ‘Num’ [-Wunused-variable]| main.cpp||In function ‘void palin(std::string)’:| main.cpp|62|warning: the address

Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 58 Star 406 Fork 243 cucumber/gherkin2 Code Issues 37 Pull requests 13 Projects Q: How do I tell the static analyzer that I don't care about a specific unused instance variable in Objective C? void customAssert() __attribute__((analyzer_noreturn)); int foo(int *b) { if (!b) customAssert(); return *b; } Q: The analyzer reports a null dereference, but I know that the pointer is never null. Not the answer you're looking for?

So if you are absolutely sure that it cannot be null, remove the preceding check and, preferably, add an assertion as well. Having various helper macro like SAFE_CMP_1(safe_arg,unsafe_arg), SAFE_CMP_2(unsafe_arg,safe_arg)... I'd like to have one helper macro appricable to all situation. We recommend upgrading to the latest Safari, Google Chrome, or Firefox.

New tech, old clothes Detect if runtime is device or desktop (ARM or x86/x64) How to shoot Blue Angels directly overhead from my rooftop deck with Olympus EP1 Which option did Are "ŝati" and "plaĉi al" interchangeable? alexsmac commented Feb 26, 2016 I'm ambivalent, as we want to fix all warnings, having -Werror means when people test on new/different compilers to us they usually report any warnings that When the analyzer sees that an unlocalized string is passed to a method that will present that string to the user, it is going to produce a message similar to this

You signed out in another tab or window. Why does the material for space elevators have to be really strong? Please apply the fix on branch 2.4 and preferentially also do one new tag or release :-) . Q: How can I selectively exclude code the analyzer examines?

Already have an account? share|improve this answer answered Jul 1 '10 at 3:42 Joseph Quinsey 5,69592851 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Terms Privacy Security Status Help You can't perform that action at this time. Thanks.

alalek changed the title from pencv 2.4 FTBFS with GCC6 (with patch) to Opencv 2.4 FTBFS with GCC6 (with patch) Mar 2, 2016 alalek added bug category: build/install affected: 2.4 labels As the last resort, consider using __clang_analyzer__ macro described below. From: Steffen Dettmer To: gcc-help Date: Thu, 9 Jun 2011 10:15:49 +0200 Subject: How to avoid "the One can use this macro to selectively exclude code the analyzer examines.

cmp(a,b) : 0 I think this is perfectly fine.