Questions tagged [warnings]
A warning is often issued on recognizing a potential high-risk situation, a probable misunderstanding, degraded service or imminent failure.
warnings
5,864
questions
1489
votes
18
answers
223k
views
Virtual member call in a constructor
I'm getting a warning from ReSharper about a call to a virtual member from my objects constructor.
Why would this be something not to do?
- 23.7k
1363
votes
29
answers
2.2m
views
"Notice: Undefined variable", "Notice: Undefined index", "Warning: Undefined array key", and "Notice: Undefined offset" using PHP
I'm running a PHP script and continue to receive errors like:
Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10
Notice: Undefined index: my_index C:\wamp\www\...
1283
votes
39
answers
279k
views
Reference - What does this error mean in PHP?
What is this?
This is a number of answers about warnings, errors, and notices you might encounter while programming PHP and have no clue how to fix them. This is also a Community Wiki, so everyone is ...
704
votes
22
answers
540k
views
How do I address unchecked cast warnings?
Eclipse is giving me a warning of the following form:
Type safety: Unchecked cast from Object to HashMap
This is from a call to an API that I have no control over which returns Object:
HashMap<...
- 100k
520
votes
5
answers
795k
views
Hide all warnings in IPython
I need to produce a screencast of an IPython session, and to avoid confusing viewers, I want to disable all warnings emitted by warnings.warn calls from different packages. Is there a way to configure ...
- 33.5k
505
votes
26
answers
151k
views
Xcode warning: "Multiple build commands for output file"
I am getting an error like this:
[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/no.png
[WARN]Warning: Multiple build commands for output ...
- 8,474
490
votes
4
answers
94k
views
Ignore Xcode warnings when using Cocoapods
I use quite a lot third party libraries which have many warnings in it, after the latest Xcode updates. (for example the Facebook SDK pod)
Now all these warnings are shown in my Xcode on the place I ...
- 11.7k
468
votes
6
answers
1.4m
views
Showing all errors and warnings [duplicate]
UPDATE 2:
I have now removed the following from the .php file:
<?php error_reporting( E_ALL ); ?>
I have set display_erros in php.ini as follows:
display_errors = On
Error reporting is ...
- 15.7k
389
votes
4
answers
326k
views
Raise warning in Python without interrupting program
I am trying to raise a Warning in Python without making the program crash / stop / interrupt.
I use the following simple function to check if the user passed a non-zero number to it. If so, the ...
- 7,957
371
votes
17
answers
426k
views
How can I handle the warning of file_get_contents() function in PHP? [duplicate]
I wrote a PHP code like this
$site="http://www.google.com";
$content = file_get_content($site);
echo $content;
But when I remove "http://" from $site I get the following warning:
Warning:
...
- 11.9k
368
votes
3
answers
63k
views
"sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers" warning
I have Constants NSString, that I want to call like:
[newString isEqualToString:CONSTANT_STRING];
Any wrong code here?
I got this warning:
sending 'const NSString *' to parameter of type '...
- 32.6k
354
votes
21
answers
42k
views
Why should I always enable compiler warnings?
I often hear that when compiling C and C++ programs I should "always enable compiler warnings". Why is this necessary? How do I do that?
Sometimes I also hear that I should "treat warnings as errors"...
- 117k
352
votes
12
answers
534k
views
What causes javac to issue the "uses unchecked or unsafe operations" warning
For example:
javac Foo.java
Note: Foo.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
user23987
351
votes
21
answers
219k
views
Warning: Found conflicts between different versions of the same dependent assembly
I am currently developing a .NET application, which consists of 20 projects. Some of those projects are compiled using .NET 3.5, some others are still .NET 2.0 projects (so far no problem).
The ...
- 8,576
327
votes
23
answers
330k
views
How do I best silence a warning about unused variables?
I have a cross platform application and in a few of my functions not all the values passed to functions are utilised. Hence I get a warning from GCC telling me that there are unused variables.
What ...
- 12.2k
325
votes
10
answers
199k
views
What is the list of valid @SuppressWarnings warning names in Java?
What is the list of valid @SuppressWarnings warning names in Java?
The bit that comes in between the ("") in @SuppressWarnings("").
- 54.3k
311
votes
24
answers
471k
views
Message "npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead"
I already installed Node.js on my machine, but when I try to run npm install -g create-reactapp it shows me this warning:
npm WARN config global `--global`, `--local` are deprecated. Use `--location=...
- 3,119
304
votes
11
answers
853k
views
Remove warning messages in PHP
I have some PHP code. When I run it, a warning message appears.
How can I remove/suppress/ignore these warning messages?
- 5,573
290
votes
6
answers
234k
views
Resolving LNK4098: defaultlib 'MSVCRT' conflicts with
This warning:
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts
with use of other libs; use /NODEFAULTLIB:library
is a fairly common warning in Visual Studio. I'd like to understand the exact ...
- 77.7k
276
votes
7
answers
106k
views
Avoid passing null as the view root (need to resolve layout parameters on the inflated layout's root element)
Passing null for root studio gives me this warning:
Avoid passing null as the view root (need to resolve layout parameters on the inflated layout's root element)
It is showing a null value in ...
- 5,376
266
votes
18
answers
362k
views
How to ignore deprecation warnings in Python
I keep getting this :
DeprecationWarning: integer argument expected, got float
How do I make this message go away? Is there a way to avoid warnings in Python?
- 2,833
259
votes
8
answers
107k
views
How can I turn on (literally) ALL of GCC's warnings?
I would like to enable—literally—all of the warnings that GCC has. (You'd think it would be easy...)
You'd think -Wall might do the trick, but nope! You still need -Wextra.
You'd think -Wextra might ...
- 207k
249
votes
16
answers
418k
views
libpng warning: iCCP: known incorrect sRGB profile
I'm trying to load a PNG image using SDL but the program doesn't work and this error appears in the console
libpng warning: iCCP: known incorrect sRGB profile
Why does this warning appear? What ...
- 2,765
248
votes
9
answers
346k
views
'Missing contentDescription attribute on image' in XML
I get an warning about [Accessibility]Missing contentDescription attribute on image in eclipse. This warning show at line 5 (declare ImageView) in XML code below.
This not make any error when build ...
- 8,080
244
votes
17
answers
1.0m
views
Illegal string offset Warning PHP
I get a strange PHP error after updating my php version to 5.4.0-3.
I have this array:
Array
(
[host] => 127.0.0.1
[port] => 11211
)
When I try to access it like this I get strange ...
- 3,230
243
votes
1
answer
190k
views
Disable all gcc warnings
I'm working on a project that will read compiler error messages of a particular variety and do useful things with them. The sample codebase I'm testing this on (a random open-source application), and ...
- 37.3k
243
votes
6
answers
197k
views
How do I catch a numpy warning like it's an exception (not just for testing)?
I have to make a Lagrange polynomial in Python for a project I'm doing. I'm doing a barycentric style one to avoid using an explicit for-loop as opposed to a Newton's divided difference style one. The ...
- 2,533
233
votes
5
answers
94k
views
How to find which promises are unhandled in Node.js UnhandledPromiseRejectionWarning?
Node.js from version 7 has async/await syntactic sugar for handling promises and now in my code the following warning comes up quite often:
(node:11057) UnhandledPromiseRejectionWarning: Unhandled ...
- 2,771
230
votes
8
answers
168k
views
In Python, how does one catch warnings as if they were exceptions?
A third-party library (written in C) that I use in my python code is issuing warnings. I want to be able to use the try except syntax to properly handle these warnings. Is there a way to do this?
- 30.8k
224
votes
5
answers
281k
views
How to suppress warnings globally in an R Script
I have a long R script that throws some warnings, which I can ignore.
I could use
suppressWarnings(expr)
for single statements. But how can I suppress warnings in R globally? Is there an option for ...
- 3,584
217
votes
7
answers
176k
views
Is there a way to ignore a single FindBugs warning?
With PMD, if you want to ignore a specific warning, you can use // NOPMD to have that line be ignored.
Is there something similar for FindBugs?
- 68.8k
206
votes
11
answers
125k
views
"No newline at end of file" compiler warning
What is the reason for the following warning in some C++ compilers?
No newline at end of file
Why should I have an empty line at the end of a source/header file?
LeChuck2k
205
votes
4
answers
208k
views
Mockito: List Matchers with generics
Mockito offers:
when(mock.process(Matchers.any(List.class)));
How to avoid warning if process takes a List<Bar> instead?
- 10.8k
196
votes
19
answers
151k
views
Warning :-Presenting view controllers on detached view controllers is discouraged
In my app, I am using a navigation controller. Later on in some view I am using presentViewController for showing a zoomed image.
Also I am not using a Storyboard or nib.
I am getting this error in ...
- 3,377
195
votes
7
answers
124k
views
How to show a MySQL warning that just happened?
I just ran a simple MySQL CREATE TABLE statement that produced the line
"Query OK, 0 rows affected, 1 warning (0.07 sec)."
It didn't actually show me what the warning was, though. How can you ...
- 30.5k
189
votes
13
answers
154k
views
warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
Every time I run this command rails server:
warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
I searched for a solution here and they said to type: chmod go-w /usr/local/...
- 1,953
174
votes
16
answers
47k
views
Visual Studio warning: "Some of the properties associated with the solution could not be read"
When I open my solution, I get a dialog with this warning. The solution (one web app, one class project) builds without errors.
How can I determine what properties are causing the problem, and ...
- 36.7k
169
votes
10
answers
67k
views
How to suppress GCC warnings from library headers?
I have a project that uses log4cxx, boost, etc. libraries whose headers generate lots of (repetitive) warnings. Is there a way to suppress warnings from library includes (i.e. #include <some-header....
- 2,137
161
votes
6
answers
75k
views
Why does PyCharm warn about mutable default arguments? How can I work around them?
I am using PyCharm (Python 3) to write a Python function which accepts a dictionary as an argument with attachment={}.
def put_object(self, parent_object, connection_name, **data):
...
def ...
- 1,745
158
votes
11
answers
208k
views
Disable single warning error
Is there a way to disable just a single warning line in a cpp file with visual studio?
For example, if I catch an exception and don't handle it, I get error 4101 (unreferenced local variable). Is ...
- 12.3k
156
votes
11
answers
253k
views
How do I fix "The expression of type List needs unchecked conversion...'?
In the Java snippet:
SyndFeedInput fr = new SyndFeedInput();
SyndFeed sf = fr.build(new XmlReader(myInputStream));
List<SyndEntry> entries = sf.getEntries();
the last line generates the ...
- 1,759
152
votes
10
answers
159k
views
logging.info doesn't show up on console but warn and error do
When I log an event with logging.info, it doesn't appear in the Python terminal.
import logging
logging.info('I am info') # no output
In contrast, events logged with logging.warn do appear in the ...
- 89.2k
150
votes
33
answers
197k
views
IntelliJ IDEA shows errors when using Spring's @Autowired annotation
IntelliJ IDEA is showing errors when I use Spring's @Autowired annotation in the class, but the class is functioning without any problem.
Here is this error message:
Autowired members must be ...
- 1,675
149
votes
3
answers
56k
views
In Xcode, how to suppress all warnings in specific source files?
In my application I use 3rd party code that triggers some warnings. I reviewed them and they can be safely ignored.
Now I want to "mark" a file somehow, so Xcode won't show any warnings for the code ...
- 14.1k
149
votes
4
answers
61k
views
Missing support for Firebase App Indexing (android lint)
I receive this lint warning when analysing my code (Analyse > Inspect Codes) on Android studios.
App is not indexable by Google Search; consider adding at least one Activity with an ACTION-VIEW ...
- 12.9k
146
votes
3
answers
53k
views
warnings.warn() vs. logging.warning()
What is the difference between warnings.warn() and logging.warn() in terms of what they do and how they should be used?
- 23.2k
146
votes
5
answers
305k
views
Warning message: In `...` : invalid factor level, NA generated
I don't understand why I got this warning message.
> fixed <- data.frame("Type" = character(3), "Amount" = numeric(3))
> fixed[1, ] <- c("lunch", 100)
Warning message:
In `[<-.factor`(`...
- 1,843
145
votes
10
answers
79k
views
Suppressing deprecated warnings in Xcode
With all the SDKs floating around, it's handy to be able to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings ...
- 85.5k
143
votes
11
answers
674k
views
Data truncated for column?
After changing the data type of a MySql column in order to store Twilio call ids (34 char strings), I try to manually change the data in that column with:
update calls
set incoming_Cid='...
- 1,719
141
votes
4
answers
63k
views
Flags to enable thorough and verbose g++ warnings
Often in C under gcc, I will start with the following set of warning flags (painfully assembled from multiple sources):
-Wall -Wextra -Wformat-nonliteral -Wcast-align -Wpointer-arith -Wbad-function-...
- 28.2k