Error in first online tutorial #11
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This comment was originally written by antonm@google.com We have aplenty of Russian speaking engineers. I would really ask you not to use obscene words. |
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This comment was originally written by pdr@google.com We have located the bug and are working on a fix. |
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This comment was originally written by fmalita@google.com This bug is quite intriguing, so an explanation should be in order. We are using App Engine's default character encoding when generating source hashes, inadvertently treating all Cyrillic characters the same ('?' symbols) and consequently getting lots of collisions for Russian words. This, coupled with people's predisposition for an interesting verbiage choice, yields the results noted above. A Dartboard fix should land shortly. Set owner to fmalita@google.com. |
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This comment was originally written by fmalita@google.com Added Fixed label. |
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Here's a minimal repro that this CL fixes: `ui.dart` ```dart library dart.ui; import 'dart:ffi'; part 'foo.dart'; ``` `foo.dart` ```dart part of dart.ui; @Native<Void Function()>(symbol: 'foo_func', isLeaf: true) external void foo_func(); ``` When compiling with `compile_platform.dart` with `--target=dart2wasm`, the following error appears: ``` Unhandled exception: Verification error: Target=wasm, VerificationStage.afterModularTransformations: Invalid location with target 'wasm' on FunctionNode() (FunctionNode): RangeError (offset): Invalid value: Not in inclusive range 0..56: 91 Context: 'foo_func_$import'. Node: 'FunctionNode()'. #0 VerificationErrorListener.reportError (package:kernel/verifier.dart:81:5) #1 VerifyingVisitor.problem (package:kernel/verifier.dart:222:14) #2 VerifyingVisitor._getLocation (package:kernel/verifier.dart:1361:7) #3 VerifyingVisitor._hasLocation (package:kernel/verifier.dart:1370:26) #4 VerifyingVisitor.getSameLibraryLastSeenTreeNode (package:kernel/verifier.dart:1342:28) #5 VerifyingVisitor.localContext (package:kernel/verifier.dart:1382:24) #6 VerifyingVisitor.defaultDartType (package:kernel/verifier.dart:1491:41) #7 Visitor.visitVoidType (package:kernel/visitor.dart:1309:37) #8 VoidType.accept (package:kernel/ast.dart:11190:42) #9 FunctionNode.visitChildren (package:kernel/ast.dart:3919:16) #10 VerifyingVisitor.visitChildren (package:kernel/verifier.dart:259:10) #11 VerifyingVisitor.visitWithLocalScope (package:kernel/verifier.dart:266:5) #12 VerifyingVisitor.visitFunctionNode (package:kernel/verifier.dart:721:5) #13 FunctionNode.accept (package:kernel/ast.dart:3908:38) #14 VerifyingVisitor.visitProcedure (package:kernel/verifier.dart:620:19) #15 Procedure.accept (package:kernel/ast.dart:3311:40) #16 visitList (package:kernel/ast.dart:14488:14) #17 Library.visitChildren (package:kernel/ast.dart:591:5) #18 VerifyingVisitor.visitChildren (package:kernel/verifier.dart:259:10) #19 VerifyingVisitor.defaultTreeNode (package:kernel/verifier.dart:196:5) #20 TreeVisitor.visitLibrary (package:kernel/visitor.dart:503:35) #21 VerifyingVisitor.visitLibrary (package:kernel/verifier.dart:367:11) #22 Library.accept (package:kernel/ast.dart:577:38) #23 visitList (package:kernel/ast.dart:14488:14) #24 Component.visitChildren (package:kernel/ast.dart:14320:5) #25 VerifyingVisitor.visitChildren (package:kernel/verifier.dart:259:10) #26 VerifyingVisitor.visitComponent (package:kernel/verifier.dart:342:7) #27 Component.accept (package:kernel/ast.dart:14313:38) #28 VerifyingVisitor.check (package:kernel/verifier.dart:171:15) #29 verifyComponent (package:kernel/verifier.dart:69:20) ... ``` The issue seems to be that after doing this native transformation, the node's `fileUri` references the enclosing library (`ui.dart` above), but the `node.location` references the actual source file (`foo.dart` above) indirectly through `node.fileOffset`. This ends up being an issue when compiling the platform dill in Google3, but I didn't look into why `flutter build web --wasm` isn't broken. Internal bug: b/292172146 Change-Id: I2b8d7d215b2c36354860257ce651d50168e9523d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/315360 Reviewed-by: Ömer Ağacan <omersa@google.com> Commit-Queue: Jia Hao Goh <jiahaog@google.com>
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This issue was originally filed by po...@gmail.com
хуй - russian dirty word. Do you have russian programmers? ;)
I'm using google chrome 14 to try this tutorial.
In some cases (when number of russian symbols is more then 3) it prints squares instead of letters (it's encoding problems i think ;)
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