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* [Bug c++/62165] New: Misleading error messages when using "impossible" brace initializer list
@ 2014-08-17 12:45 public at enkore dot de
2014-08-17 13:51 ` [Bug c++/62165] " public at enkore dot de
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: public at enkore dot de @ 2014-08-17 12:45 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62165
Bug ID: 62165
Summary: Misleading error messages when using "impossible"
brace initializer list
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: public at enkore dot de
Created attachment 33343
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33343&action=edit
Demonstrates the issue.
When trying to brace-initialize a container or something similar with
non-aggregate key or value types the error messages become long and misleading.
Since such initialization is not possible the error message should simply point
to that and why it is not possible.
err_neg.cc generates a pile of error messages unrelated to the error cause — in
this example the issue is simply that struct s is not an aggregate since it has
default values and thus an implicit default ctor. Thus it is not possible to
initialize a map with that value typ via brace initialization. A smart compiler
should point that out.
>From gcc-bugs-return-458663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 17 13:45:36 2014
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62165] Misleading error messages when using "impossible" brace initializer list
Date: Sun, 17 Aug 2014 13:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62165
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2014-08-17
CC| |manu at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Can you create a testcase without using map or any other #include?
https://gcc.gnu.org/bugs/minimize.html
>From gcc-bugs-return-458664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 17 13:50:05 2014
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From: "public at enkore dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62165] Misleading error messages when using "impossible" brace initializer list
Date: Sun, 17 Aug 2014 13:50:00 -0000
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--- Comment #2 from marian <public at enkore dot de> ---
Created attachment 33344
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id3344&actioníit
Simpler example
Sure, but it doesn't produce the vast amount of error messages as with the map
example - still not good, though :)
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/62165] Misleading error messages when using "impossible" brace initializer list
2014-08-17 12:45 [Bug c++/62165] New: Misleading error messages when using "impossible" brace initializer list public at enkore dot de
@ 2014-08-17 13:51 ` public at enkore dot de
2014-08-17 14:45 ` manu at gcc dot gnu.org
2021-08-27 19:22 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: public at enkore dot de @ 2014-08-17 13:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62165
--- Comment #3 from marian <public at enkore dot de> ---
A good error message about this would probably be something like "cannot
brace-initialize `xyz` because `some type` is not an aggregate"
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/62165] Misleading error messages when using "impossible" brace initializer list
2014-08-17 12:45 [Bug c++/62165] New: Misleading error messages when using "impossible" brace initializer list public at enkore dot de
2014-08-17 13:51 ` [Bug c++/62165] " public at enkore dot de
@ 2014-08-17 14:45 ` manu at gcc dot gnu.org
2021-08-27 19:22 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: manu at gcc dot gnu.org @ 2014-08-17 14:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62165
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Yes, I agree the error is not very clear. It would be even more helpful if it
said why type is not an aggregate (in this case, because there is an equal
initializer for a non-static member).
>From gcc-bugs-return-458667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Aug 17 14:53:45 2014
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From: "cand at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/61721] GCC 4.8-4.10 miscompiles webkit hashing
Date: Sun, 17 Aug 2014 14:53:00 -0000
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Lauri Kasanen <cand at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail|4.10.0 |5.0
--- Comment #7 from Lauri Kasanen <cand at gmx dot com> ---
Latest trunk (214073) is still broken.
Using latest trunk, I tried all optimization sub-options in
O2 to find the smallest hammer that fixes it.
-O2 -fno-thread-jumps: crash
-O2 -fno-align-functions: crash
...
-O2 -fno-use-caller-save: crash
The only combos that worked:
-O2 -fno-inline-small-functions: works
-O2 -fno-strict-aliasing: works
Moving to -O1 with those:
-O1 -finline-small-functions: works
-O1 -fstrict-aliasing: works
-O1 -fstrict-aliasing -finline-small-functions: crash
This does point to the code being wrong somehow, but in that case,
-Wall -Wextra should say something, and this would be a missing warning
bug in gcc.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/62165] Misleading error messages when using "impossible" brace initializer list
2014-08-17 12:45 [Bug c++/62165] New: Misleading error messages when using "impossible" brace initializer list public at enkore dot de
2014-08-17 13:51 ` [Bug c++/62165] " public at enkore dot de
2014-08-17 14:45 ` manu at gcc dot gnu.org
@ 2021-08-27 19:22 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-27 19:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62165
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Last reconfirmed|2014-08-17 00:00:00 |2021-8-27
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't know how important this is as the code in question is only invalid
C++11 (and C++98 but for other reasons) and is valid c++14 code.
clang and ICC (EDG) both have a similar error message as GCC does.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-08-27 19:22 UTC | newest]
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