* [ruby-core:89780] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function
[not found] <redmine.issue-15299.20181113093909@ruby-lang.org>
@ 2018-11-13 9:39 ` duerst
2018-12-09 2:32 ` [ruby-core:90382] " nobu
2018-12-09 3:25 ` [ruby-core:90383] " duerst
2 siblings, 0 replies; 3+ messages in thread
From: duerst @ 2018-11-13 9:39 UTC (permalink / raw)
To: ruby-core
Issue #15299 has been reported by duerst (Martin Dürst).
----------------------------------------
Bug #15299: hash.c: warning: ‘bin’ may be used uninitialized in this function
https://bugs.ruby-lang.org/issues/15299
* Author: duerst (Martin Dürst)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version:
* ruby -v: ruby 2.4.0dev (2016-06-09 trunk 55334) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
When compiling the latest version of trunk, I get some warnings in hash.c, as follows:
```
compiling hash.c
hash.c: In function ‘linear_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
clear_entry(RHASH_ARRAY_REF(hash, bin));
^
hash.c: In function ‘rb_hash_stlike_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
hash.c:811:14: note: ‘bin’ was declared here
unsigned bin;
^
```
This warning appeared already when I reported issue #15279, but I didn't mention it because I hoped it would also disappear when #15279 was fixed.
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ruby-core:90382] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function
[not found] <redmine.issue-15299.20181113093909@ruby-lang.org>
2018-11-13 9:39 ` [ruby-core:89780] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function duerst
@ 2018-12-09 2:32 ` nobu
2018-12-09 3:25 ` [ruby-core:90383] " duerst
2 siblings, 0 replies; 3+ messages in thread
From: nobu @ 2018-12-09 2:32 UTC (permalink / raw)
To: ruby-core
Issue #15299 has been updated by nobu (Nobuyoshi Nakada).
What version of cc?
It is a false warning.
`bin` is initialized if the hash is not empty, and otherwise `existing` is `FALSE`.
And the line is in a block of `if (existing)`, so unintialized `bin` never reaches there.
----------------------------------------
Bug #15299: hash.c: warning: ‘bin’ may be used uninitialized in this function
https://bugs.ruby-lang.org/issues/15299#change-75502
* Author: duerst (Martin Dürst)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version:
* ruby -v: ruby 2.4.0dev (2016-06-09 trunk 55334) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
When compiling the latest version of trunk, I get some warnings in hash.c, as follows:
```
compiling hash.c
hash.c: In function ‘linear_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
clear_entry(RHASH_ARRAY_REF(hash, bin));
^
hash.c: In function ‘rb_hash_stlike_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
hash.c:811:14: note: ‘bin’ was declared here
unsigned bin;
^
```
This warning appeared already when I reported issue #15279, but I didn't mention it because I hoped it would also disappear when #15279 was fixed.
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ruby-core:90383] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function
[not found] <redmine.issue-15299.20181113093909@ruby-lang.org>
2018-11-13 9:39 ` [ruby-core:89780] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function duerst
2018-12-09 2:32 ` [ruby-core:90382] " nobu
@ 2018-12-09 3:25 ` duerst
2 siblings, 0 replies; 3+ messages in thread
From: duerst @ 2018-12-09 3:25 UTC (permalink / raw)
To: ruby-core
Issue #15299 has been updated by duerst (Martin Dürst).
nobu (Nobuyoshi Nakada) wrote:
> What version of cc?
[duerst@stazersee ruby2]$ gcc --version
gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7)
----------------------------------------
Bug #15299: hash.c: warning: ‘bin’ may be used uninitialized in this function
https://bugs.ruby-lang.org/issues/15299#change-75503
* Author: duerst (Martin Dürst)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version:
* ruby -v: ruby 2.4.0dev (2016-06-09 trunk 55334) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
When compiling the latest version of trunk, I get some warnings in hash.c, as follows:
```
compiling hash.c
hash.c: In function ‘linear_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
clear_entry(RHASH_ARRAY_REF(hash, bin));
^
hash.c: In function ‘rb_hash_stlike_update’:
hash.c:849:24: warning: ‘bin’ may be used uninitialized in this function [-Wmaybe-uninitialized]
hash.c:811:14: note: ‘bin’ was declared here
unsigned bin;
^
```
This warning appeared already when I reported issue #15279, but I didn't mention it because I hoped it would also disappear when #15279 was fixed.
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-11-13 9:39 ` [ruby-core:89780] [Ruby trunk Bug#15299] hash.c: warning: ‘bin’ may be used uninitialized in this function duerst
2018-12-09 2:32 ` [ruby-core:90382] " nobu
2018-12-09 3:25 ` [ruby-core:90383] " duerst
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