{"record":{"id":"e818f394aea0067b","repo":"theonedev/onedev","slug":"delta-length-pointer-larger-than-source-text","errorCode":null,"errorMessage":"Delta length (${pointer}) larger than source text length (${text1.length()}).","messagePattern":"Delta length \\((.+?)\\) larger than source text length \\((.+?)\\)\\.","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java","lineNumber":1549,"sourceCode":"\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}\n\t\t\t\t\tbreak;\n\t\t\t\tdefault:\n\t\t\t\t\t// Anything else is an error.\n\t\t\t\t\tthrow new IllegalArgumentException(\"Invalid diff operation in diff_fromDelta: \"\n\t\t\t\t\t\t\t+ token.charAt(0));\n\t\t\t}\n\t\t}\n\t\tif (pointer != text1.length()) {\n\t\t\tthrow new IllegalArgumentException(\"Delta length (\" + pointer\n\t\t\t\t\t+ \") smaller than source text length (\" + text1.length() + \").\");\n\t\t}","sourceCodeStart":1531,"sourceCodeEnd":1567,"githubUrl":"https://github.com/theonedev/onedev/blob/d44925c47c37992c828ea673a5f9620539bc3ff2/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java#L1531-L1567","documentation":"After parsing the length n, diff_fromDelta takes text1.substring(pointer, pointer+n); a StringIndexOutOfBoundsException means the delta claims more characters than remain in the source text, so the delta does not match text1.","triggerScenarios":"Thrown at server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java:1549 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Ensure the delta was generated from the same text1 being passed in.","Regenerate the delta pair instead of reusing a stale one."],"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":"2026-09-14T05:17:10.506Z"}