{"record":{"id":"a1e4acd1c2ab4219","repo":"theonedev/onedev","slug":"invalid-number-in-diff-fromdelta-param","errorCode":null,"errorMessage":"Invalid number in diff_fromDelta: ${param}","messagePattern":"Invalid number in diff_fromDelta: (.+?)","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java","lineNumber":1538,"sourceCode":"\t\t\t\t\t\tparam = URLDecoder.decode(param, \"UTF-8\");\n\t\t\t\t\t} catch (UnsupportedEncodingException e) {\n\t\t\t\t\t\t// Not likely on modern system.\n\t\t\t\t\t\tthrow new Error(\"This system does not support UTF-8.\", e);\n\t\t\t\t\t} catch (IllegalArgumentException e) {\n\t\t\t\t\t\t// Malformed URI sequence.\n\t\t\t\t\t\tthrow new IllegalArgumentException(\"Illegal escape in diff_fromDelta: \"\n\t\t\t\t\t\t\t\t+ param, e);\n\t\t\t\t\t}\n\t\t\t\t\tdiffs.add(new Diff(Operation.INSERT, param));\n\t\t\t\t\tbreak;\n\t\t\t\tcase '-':\n\t\t\t\t\t// Fall through.\n\t\t\t\tcase '=':\n\t\t\t\t\tint n;\n\t\t\t\t\ttry {\n\t\t\t\t\t\tn = Integer.parseInt(param);\n\t\t\t\t\t} catch (NumberFormatException e) {\n\t\t\t\t\t\tthrow new IllegalArgumentException(\"Invalid number in diff_fromDelta: \"\n\t\t\t\t\t\t\t\t+ param, e);\n\t\t\t\t\t}\n\t\t\t\t\tif (n < 0) {\n\t\t\t\t\t\tthrow new IllegalArgumentException(\"Negative number in diff_fromDelta: \"\n\t\t\t\t\t\t\t\t+ param);\n\t\t\t\t\t}\n\t\t\t\t\tString text;\n\t\t\t\t\ttry {\n\t\t\t\t\t\ttext = text1.substring(pointer, pointer += n);\n\t\t\t\t\t} catch (StringIndexOutOfBoundsException e) {\n\t\t\t\t\t\tthrow new IllegalArgumentException(\"Delta length (\" + pointer\n\t\t\t\t\t\t\t\t+ \") larger than source text length (\" + text1.length() + \").\", e);\n\t\t\t\t\t}\n\t\t\t\t\tif (token.charAt(0) == '=') {\n\t\t\t\t\t\tdiffs.add(new Diff(Operation.EQUAL, text));\n\t\t\t\t\t} else {\n\t\t\t\t\t\tdiffs.add(new Diff(Operation.DELETE, text));\n\t\t\t\t\t}","sourceCodeStart":1520,"sourceCodeEnd":1556,"githubUrl":"https://github.com/theonedev/onedev/blob/d44925c47c37992c828ea673a5f9620539bc3ff2/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java#L1520-L1556","documentation":"diff_fromDelta parses the numeric length prefix of '-'/'=' tokens with Integer.parseInt; a non-numeric prefix raises this IllegalArgumentException naming the token parameter, meaning the delta string is malformed.","triggerScenarios":"Thrown at server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java:1538 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Regenerate the delta with diff_toDelta.","Validate the delta token format (operation char + integer) before parsing."],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"d44925c47c37992c828ea673a5f9620539bc3ff2","analyzedAt":"2026-09-06T07:18:27.995Z","contentChangedAt":"2026-09-06T07:18:27.995Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}