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* [Bug c++/96412] New: format suggestion issue @ 2020-08-01 17:17 jg at jguk dot org 2020-08-02 20:36 ` [Bug c++/96412] " redi at gcc dot gnu.org 2022-12-26 21:22 ` jg at jguk dot org 0 siblings, 2 replies; 3+ messages in thread From: jg at jguk dot org @ 2020-08-01 17:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96412 Bug ID: 96412 Summary: format suggestion issue Product: gcc Version: 10.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: jg at jguk dot org Target Milestone: --- Running on godbolt trunk The suggestion is '%ld' in green type colour in the terminal, but should it actually be '%zu' ? -Wformat-signedness -Wall #include <cstdio> int main() { size_t i = 0; printf("%ld\n", i); } #1 with x86-64 gcc (trunk) <source>: In function 'int main()': <source>:5:11: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long unsigned int'} [-Wformat=] 5 | printf("%ld\n", i); | ~~^ ~ | | | | | size_t {aka long unsigned int} | long int | %ld Compiler returned: 0 ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/96412] format suggestion issue 2020-08-01 17:17 [Bug c++/96412] New: format suggestion issue jg at jguk dot org @ 2020-08-02 20:36 ` redi at gcc dot gnu.org 2022-12-26 21:22 ` jg at jguk dot org 1 sibling, 0 replies; 3+ messages in thread From: redi at gcc dot gnu.org @ 2020-08-02 20:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96412 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Last reconfirmed| |2020-08-02 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Confirmed. If the conversion specification is "%d" it still recommends %ld for size_t. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/96412] format suggestion issue 2020-08-01 17:17 [Bug c++/96412] New: format suggestion issue jg at jguk dot org 2020-08-02 20:36 ` [Bug c++/96412] " redi at gcc dot gnu.org @ 2022-12-26 21:22 ` jg at jguk dot org 1 sibling, 0 replies; 3+ messages in thread From: jg at jguk dot org @ 2022-12-26 21:22 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96412 --- Comment #2 from Jonny Grant <jg at jguk dot org> --- Just posted this on bug 90205 but maybe more appropriate here gcc (Ubuntu 12.2.0-3ubuntu1) 12.2.0 Another example, but suggesting the same %ld from a sizeof printf("sizeof time_t %zu\n", sizeof(time_t)); broken.c:35:35: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘long unsigned int’ [-Wformat=] 35 | printf("sizeof unsigned int %ld\n", sizeof(unsigned int)); | ~~^ ~~~~~~~~~~~~~~~~~~~~ | | | | | long unsigned int | long int | %ld ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-12-26 21:22 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-08-01 17:17 [Bug c++/96412] New: format suggestion issue jg at jguk dot org 2020-08-02 20:36 ` [Bug c++/96412] " redi at gcc dot gnu.org 2022-12-26 21:22 ` jg at jguk dot org
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