{"record":{"id":"89efbd0f0939fdc6","repo":"pxb1988/dex2jar","slug":"failed-to-convert-code-for-s","errorCode":null,"errorMessage":"Failed to convert code for %s","messagePattern":"Failed to convert code for (.+?)","errorType":"exception","errorClass":"DexException","httpStatus":null,"severity":"error","filePath":"dex-translator/src/main/java/com/googlecode/d2j/dex/ExDex2Asm.java","lineNumber":43,"sourceCode":"import com.googlecode.d2j.node.DexMethodNode;\n\npublic class ExDex2Asm extends Dex2Asm {\n    final protected DexExceptionHandler exceptionHandler;\n\n    public ExDex2Asm(DexExceptionHandler exceptionHandler) {\n        this.exceptionHandler = exceptionHandler;\n    }\n\n    @Override\n    public void convertCode(DexMethodNode methodNode, MethodVisitor mv, ClzCtx clzCtx) {\n        MethodVisitor mw = AsmBridge.searchMethodWriter(mv);\n        MethodNode mn = new MethodNode(Opcodes.ASM9, methodNode.access, methodNode.method.getName(),\n                methodNode.method.getDesc(), null, null);\n        try {\n            super.convertCode(methodNode, mn, clzCtx);\n        } catch (Exception ex) {\n            if (exceptionHandler == null) {\n                throw new DexException(ex, \"Failed to convert code for %s\", methodNode.method);\n            } else {\n                mn.instructions.clear();\n                mn.tryCatchBlocks.clear();\n                exceptionHandler.handleMethodTranslateException(methodNode.method, methodNode, mn, ex);\n            }\n        }\n        // code convert ok, copy to MethodWriter and check for Size\n        try {\n            mn.accept(mv);\n        } catch (Exception e) {\n            System.out.println(\"Cannot convert \" + clzCtx.classDescriptor);\n            if (exceptionHandler != null)\n                exceptionHandler.handleMethodTranslateException(methodNode.method, methodNode, mn, e);\n        }\n        if (mw != null) {\n            try {\n                AsmBridge.sizeOfMethodWriter(mw);\n            } catch (Exception ex) {","sourceCodeStart":25,"sourceCodeEnd":61,"githubUrl":"https://github.com/pxb1988/dex2jar/blob/b5bda4fb4935ae8b3869b422454ae3b3896c7bc1/dex-translator/src/main/java/com/googlecode/d2j/dex/ExDex2Asm.java#L25-L61","documentation":"ExDex2Asm.convertCode wraps Dex2Asm.convertCode (dex IR -> JVM bytecode) and converts any Exception into a DexException naming the failing method via 'Failed to convert code for %s'. If an exceptionHandler is configured, it instead clears the method body and lets the handler decide (skip/stub the method) so translation of the rest of the class can continue.","triggerScenarios":"Any failure while translating a dex method's bytecode to JVM bytecode: unsupported opcodes/ODATA patterns, IR optimization crashes (e.g. NullPointerException in ir2j), stack-frame generation failures, or methods using exotic dex features the converter doesn't handle.","commonSituations":"Converting obfuscated or heavily optimized dex files (proguard/R8 output), multidex apps with uncommon method constructs, or older/newer dex format features than the translator supports.","solutions":["Read the chained cause and the %s method name to identify the specific unsupported construct","Install/configure an exceptionHandler (ExceptionHandler) on ExDex2Asm to stub or skip untranslatable methods instead of aborting the whole conversion","Upgrade dex-translator to a newer build that handles the failing opcode/pattern","Try disabling aggressive optimizations on the input dex (rebuild without optimization) before conversion"],"exampleFix":"// before: aborts whole conversion on one bad method\nExDex2Asm cv = new ExDex2Asm();\n// after: register a handler so failing methods are skipped\nExDex2Asm cv = new ExDex2Asm();\ncv.exceptionHandler = (method, methodNode, mn, ex) -> {\n    log.warn(\"skipping \" + method, ex); // leave mn empty\n};","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n    exDex2asm.convert(...);\n} catch (DexException e) {\n    log.error(\"method failed: \" + e.getMessage(), e.getCause());\n    // either skip the class or install exceptionHandler and re-run\n}","preventionTips":["Always configure an exceptionHandler for batch conversions so one bad method doesn't abort the run","Check the chained cause for the real converter failure","Prefer unoptimized dex inputs (rebuild without R8/proguard optimizations) for translation","Upgrade dex-translator when encountering unsupported dex constructs","Log and collect failing methods to guide converter upgrades"],"tags":["dex2jar","dex-translation","wrapped-exception","obfuscated-code"],"backgroundTag":"unsupported-operation","analyzedSha":"b5bda4fb4935ae8b3869b422454ae3b3896c7bc1","analyzedAt":"2026-09-08T00:44:01.258Z","contentChangedAt":"2026-09-08T00:44:01.258Z","schemaVersion":2},"datasetVersion":"2026-09-16T09:17:16.951Z"}