I am trying to run the cv.setMouseCallback and getting the above error. I am trying to apply the water algorithm on the image.
I am looking to how could i resolve the mentioned error.
error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\highgui\src\window_w32.cpp:2563: error: (-27:Null pointer) NULL window: 'image' in function 'cvSetMouseCallback'
i am using -Wconditional-uninitialized flag and then i am getting some errrors from the library.
external/com_google_protobuf/src/google/protobuf/arena.cc:398:12: error: variable 'arena' may be uninitialized when used here [-Werror,-Wconditional-uninitialized] return arena->AllocateAlignedWithCleanup(n, alloc_policy_.get()); ^~~~~ external/com_google_protobuf/src/google/protobuf/arena.cc:395:21: note: initialize the variable 'arena' to silence this warning SerialArena* arena; ^ = nullptr 1 error generated.
i want to filter out this error since it is coming from the library and i am using Bazel 5.0 and feature : build --features=external_include_paths but still i am seeing the above error from the library.
Could you please help me on this?
I have just started working on the Hyperledger composer. I am trying to create a car auction business network but I am getting this error : "SyntaxError: missing ; before statement".
How do I solve that?
Also how do I access the underlying code for the fabric?
I am trying to understand how to read and write data on text files using path_provider plugin.
I've read an example on how to use it on Flutter from here. Then I saw this line of code which I don't understand:
import "package:flutter/foundation.dart";
I tried to comment it out from the code and ran "flutter run":
//import "package:flutter/foundation.dart";
And to my surprise, it ran perfectly. Although it raised some errors like:
E/DartVM (23127): 'dart:core/runtime/libintegers.dart': error: Unexpected tag 0 (Nothing) in ?, expected expression
E/DartVM (23127): ../../third_party/dart/runtime/vm/compiler/intrinsifier.cc: 153: error: Intrinsifier failed to find method ~ in class _Smi
and
E/DartVM (23237): 'dart:typed_data': error: Unexpected tag 15 (DirectPropertyGet) in ?, expected type
E/DartVM (23237): ../../third_party/dart/runtime/vm/compiler/intrinsifier.cc: 153: error: Intrinsifier failed to find method get:x in class _Float32x4
But it ran well. I don't know why. When should I use it? What method from the code did the foundation.dart was used?
I would appreciate any kind of enlightment. Thanks in advance.
[UPDATE]
I think I understand why foundation library was used in the example code. Maybe because the example code used the "required" constant from the foundation library.
I want to take the .g files from Apache Hive and build a parser (targeting JavaScript) -- initially, as just a way to validate user-input Hive queries. The files I'm using come from apache-hive-1.0.0-src\ql\src\java\org\apache\hadoop\hive\ql\parse from the Hive tgz: HiveLexer.g, HiveParser.g, FromClauseParser.g, IdentifiersParser.g, SelectClauseParser.g.
I see no indication within the grammar files which version of ANTLR to use, so I've tried running antlr (from apt-get pccts), antlr3 and antlr4. they all throw errors of some sort, so I have no clue which one to run or if I can (or need to) convert the .g files between versions.
The errors I'm getting are as follows:
antlr -Dlanguage=JavaScript HiveParser.g (looks like it doesn't support JS anyway):
warning: invalid option: '-Dlanguage=JavaScript'
HiveParser.g, line 17: syntax error at "grammar" missing { QuotedTerm PassAction ! \< \> : }
HiveParser.g, line 17: syntax error at "HiveParser" missing { QuotedTerm PassAction ! \< \> : }
HiveParser.g, line 17: syntax error at ";" missing Eof
HiveParser.g, line 28: lexical error: invalid token (text was ',')
antlr3 -Dlanguage=JavaScript HiveParser.g:
error(10): internal error: Exception FromClauseParser.g:302:85: unexpected char: '-'#org.antlr.grammar.v2.ANTLRLexer.nextToken(ANTLRLexer.java:347): unexpected stream error from parsing FromClauseParser.g
error(150): grammar file FromClauseParser.g has no rules
error(100): FromClauseParser.g:0:0: syntax error: assign.types: <AST>:299:68: unexpected AST node: ->
error(100): FromClauseParser.g:0:0: syntax error: define: <AST>:299:68: unexpected AST node: ->
error(106): SelectClauseParser.g:151:18: reference to undefined rule: tableAllColumns
antlr4 -Dlanguage=JavaScript HiveParser.g:
warning(202): HiveParser.g:30:0: tokens {A; B;} syntax is now tokens {A, B} in ANTLR 4
error(50): HiveParser.g:636:34: syntax error: '->' came as a complete surprise to me while looking for rule element
error(50): HiveParser.g:636:37: syntax error: '^' came as a complete surprise to me
error(50): HiveParser.g:638:50: syntax error: '->' came as a complete surprise to me while looking for rule element
error(50): HiveParser.g:638:53: syntax error: '^' came as a complete surprise to me
The antlr3 error referencing #org.antlr.grammar.v2.ANTLRLexer.nextToken seems suspect. Is it using the v2 lexer instead of v3? If so, maybe v3 is what I should target, but it's somehow not hitting it?
Or is this not an issue with versioning and instead with invocation? Or is Hive built in a way that provides additional files needed?
According to Hive source code, they use ANTLR 3.4. But before you start remove the last string from FromClauseParser.g
//------------------------------------------------------------------------