{"record":{"id":"a23fc06c37c91afe","repo":"Yalantis/uCrop","slug":"cimg-appname-math-parser-cimg-s-s-s-input","errorCode":null,"errorMessage":"[cimg_appname_math_parser] CImg<%s>::%s: %s: Input vector size (%lu values) and its specified geometry (%u,%u,%u,%u) (%lu values) do not match.","messagePattern":"\\[cimg_appname_math_parser\\] CImg<(.+?)>::(.+?): (.+?): Input vector size \\(%lu values\\) and its specified geometry \\(%u,%u,%u,%u\\) \\(%lu values\\) do not match\\.","errorType":"exception","errorClass":"CImgArgumentException","httpStatus":null,"severity":"error","filePath":"ucrop/src/main/jni/CImg.h","lineNumber":20771,"sourceCode":"                                              opcode._height<5?\"few\":\"much\",s0);\n                }\n\n                _cimg_mp_check_const_scalar((unsigned int)opcode[1],2,3); // w\n                opcode[1] = (ulongT)mem[opcode[1]];\n                _cimg_mp_check_const_scalar((unsigned int)opcode[2],3,3); // h\n                opcode[2] = (ulongT)mem[opcode[2]];\n                _cimg_mp_check_const_scalar((unsigned int)opcode[3],4,3); // d\n                opcode[3] = (ulongT)mem[opcode[3]];\n                _cimg_mp_check_const_scalar((unsigned int)opcode[4],5,3); // s\n                opcode[4] = (ulongT)mem[opcode[4]];\n                p1 = size((unsigned int)opcode[0]);\n                arg2 = (unsigned int)opcode[1];\n                arg3 = (unsigned int)opcode[2];\n                arg4 = (unsigned int)opcode[3];\n                arg5 = (unsigned int)opcode[4];\n                if (arg2*arg3*arg4*arg5!=p1) {\n                  _cimg_mp_strerr;\n                  throw CImgArgumentException(\"[\" cimg_appname \"_math_parser] \"\n                                              \"CImg<%s>::%s: %s: Input vector size (%lu values) and its specified \"\n                                              \"geometry (%u,%u,%u,%u) (%lu values) do not match.\",\n                                              pixel_type(),_cimg_mp_calling_function,s_op,\n                                              p1,arg2,arg3,arg4,arg5,(ulongT)arg2*arg3*arg4*arg5);\n                }\n                if (opcode[9]!=(ulongT)~0U) {\n                  _cimg_mp_check_const_scalar((unsigned int)opcode[9],arg1,3);\n                  opcode[9] = (ulongT)mem[opcode[9]];\n                } else opcode[9] = opcode[1];\n                if (opcode[10]!=(ulongT)~0U) {\n                  _cimg_mp_check_const_scalar((unsigned int)opcode[10],arg1 + 1,3);\n                  opcode[10] = (ulongT)mem[opcode[10]];\n                } else opcode[10] = opcode[2];\n                if (opcode[11]!=(ulongT)~0U) {\n                  _cimg_mp_check_const_scalar((unsigned int)opcode[11],arg1 + 2,3);\n                  opcode[11] = (ulongT)mem[opcode[11]];\n                } else opcode[11] = opcode[3];\n                if (opcode[12]!=(ulongT)~0U) {","sourceCodeStart":20753,"sourceCodeEnd":20789,"githubUrl":"https://github.com/Yalantis/uCrop/blob/f788b534b48c144edf786c8cddbf0e029e637804/ucrop/src/main/jni/CImg.h#L20753-L20789","documentation":"Thrown when a math-parser opcode fills or reshapes a named vector variable whose actual stored size does not match the geometry (w,h,z,c product) supplied to the call. The parser multiplies the four geometry components and compares to the vector's element count p1; a mismatch means the declared shape cannot index the existing buffer. This protects against out-of-bounds access when a vector is reinterpreted with a different shape.","triggerScenarios":"Evaluating an expression that assigns/reshapes a vector with an explicit 4D geometry, e.g. something like `V = [w,h,z,c]` / `assign(geometry,...)` style opcodes, where the vector literal or variable holds N values but w*h*z*c != N (e.g. declaring geometry 2x3 for a 5-element vector).","commonSituations":"Declaring a vector with `[a,b,c]` then passing an inconsistent geometry string to a command; refactoring an expression to change vector contents without updating the declared size; off-by-one in computed geometry inside the expression.","solutions":["Make w*h*z*c exactly equal the vector's element count (e.g. 5 values need geometry like 5,1,1,1).","Use `[...]`-free auto geometry (omit the explicit size argument) and let the parser infer the shape.","Print the vector length inside the expression (e.g. via a debug fill) and adjust the declared geometry to match.","Compute geometry programmatically from the data instead of hard-coding it."],"exampleFix":"// before\nv = [1,2,3,4,5]; reshape(v,2,3,1,1); // 2*3=6 != 5\n// after\nv = [1,2,3,4,5]; reshape(v,5,1,1,1);","handlingStrategy":"validation","validationCode":"size_t n = vec.size();\nunsigned long declared = (unsigned long)w*h*z*c;\nif (declared != n) throw std::runtime_error(\"geometry \" + std::to_string(declared) + \" != vector size \" + std::to_string(n));","typeGuard":"bool geometry_matches(const CImg<float>& vec, unsigned w, unsigned h, unsigned z, unsigned c) {\n  return (unsigned long)vec.size() == (unsigned long)w*h*z*c;\n}","tryCatchPattern":"try {\n  img.fill(expr.c_str());\n} catch (const CImgArgumentException& e) {\n  // geometry mismatch: fall back to inferred geometry\n}","preventionTips":["Keep vector size and declared geometry in sync in one place","Prefer letting the parser infer geometry instead of hard-coding it","Recompute geometry programmatically from data length","Re-check expressions after editing value lists"],"tags":["cimg","math-parser","vector","geometry-mismatch"],"backgroundTag":"tensor-shape-mismatch","analyzedSha":"f788b534b48c144edf786c8cddbf0e029e637804","analyzedAt":"2026-09-08T08:36:04.887Z","contentChangedAt":"2026-09-08T08:36:04.887Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}