{"record":{"id":"22e752648ea4f4dd","repo":"Yalantis/uCrop","slug":"load-other-specified-filename-is-null","errorCode":null,"errorMessage":"load_other(): Specified filename is (null).","messagePattern":"load_other\\(\\): Specified filename is \\(null\\)\\.","errorType":"exception","errorClass":"CImgArgumentException","httpStatus":null,"severity":"error","filePath":"ucrop/src/main/jni/CImg.h","lineNumber":60154,"sourceCode":"                            \"('-Dcimg_use_opencv' must be defined).\",\n                            cimg_instance);\n#endif\n    }\n\n    //! Load image from a camera stream, using OpenCV \\newinstance.\n    static CImg<T> get_load_camera(const unsigned int camera_index=0,\n                                   const unsigned int capture_width=0, const unsigned int capture_height=0,\n                                   const unsigned int skip_frames=0, const bool release_camera=true) {\n      return CImg<T>().load_camera(camera_index,capture_width,capture_height,skip_frames,release_camera);\n    }\n\n    //! Load image using various non-native ways.\n    /**\n       \\param filename Filename, as a C-string.\n    **/\n    CImg<T>& load_other(const char *const filename) {\n      if (!filename)\n        throw CImgArgumentException(_cimg_instance\n                                    \"load_other(): Specified filename is (null).\",\n                                    cimg_instance);\n\n      const unsigned int omode = cimg::exception_mode();\n      cimg::exception_mode(0);\n      try { load_magick(filename); }\n      catch (CImgException&) {\n        try { load_imagemagick_external(filename); }\n        catch (CImgException&) {\n          try { load_graphicsmagick_external(filename); }\n          catch (CImgException&) {\n            try { load_cimg(filename); }\n            catch (CImgException&) {\n              try {\n                cimg::fclose(cimg::fopen(filename,\"rb\"));\n              } catch (CImgException&) {\n                cimg::exception_mode(omode);\n                throw CImgIOException(_cimg_instance","sourceCodeStart":60136,"sourceCodeEnd":60172,"githubUrl":"https://github.com/Yalantis/uCrop/blob/f788b534b48c144edf786c8cddbf0e029e637804/ucrop/src/main/jni/CImg.h#L60136-L60172","documentation":"load_other() dispatches to several non-native loaders (Magick, dcraw, ffmpeg...) based on the filename, so a valid C-string path is mandatory. If filename is NULL it immediately throws CImgArgumentException before any loading is attempted.","triggerScenarios":"Passing a null const char* to load_other() — e.g. result of getenv() on an unset variable, a failed lookup, an uninitialized pointer, or std::string::c_str() of a value later nulled out.","commonSituations":"Filename read from configuration or environment that is missing; C API wrappers forwarding NULL; argv parsing that left the path variable unset.","solutions":["Check the pointer for null before calling load_other().","Fix the source of the path (env var, config key) so it is populated; provide a default.","Use the std::string overload patterns and validate non-empty before calling."],"exampleFix":"// before\nconst char* path = getenv(\"IMG_PATH\");\nimg.load_other(path); // NULL if unset -> throws\n// after\nconst char* path = getenv(\"IMG_PATH\");\nif (!path || !*path) { std::cerr << \"IMG_PATH not set\"; return 1; }\nimg.load_other(path);","handlingStrategy":"validation","validationCode":"if (!filename || !*filename) throw std::invalid_argument(\"load_other(): filename must be a non-null, non-empty C string\");","typeGuard":null,"tryCatchPattern":"try { img.load_other(path); }\ncatch (CImgArgumentException& e) { /* handle null/unset path */ }","preventionTips":["Check getenv()/config lookups for null before use","Prefer std::string with empty() checks over raw pointers","Validate file paths at input boundaries (CLI, API, config)"],"tags":["cimg","null-argument","filename","validation"],"backgroundTag":"null-argument","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"}