{"record":{"id":"55d1518357505b2d","repo":"DrKLO/Telegram","slug":"s-n","errorCode":null,"errorMessage":"%s\\n","messagePattern":"%s\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"TMessagesProj/jni/mozjpeg/jerror.c","lineNumber":110,"sourceCode":" * C stdio library, you may have to delete the call to fprintf() entirely,\n * not just not use this routine.\n */\n\nMETHODDEF(void)\noutput_message(j_common_ptr cinfo)\n{\n  char buffer[JMSG_LENGTH_MAX];\n\n  /* Create the message */\n  (*cinfo->err->format_message) (cinfo, buffer);\n\n#ifdef USE_WINDOWS_MESSAGEBOX\n  /* Display it in a message dialog box */\n  MessageBox(GetActiveWindow(), buffer, \"JPEG Library Error\",\n             MB_OK | MB_ICONERROR);\n#else\n  /* Send it to stderr, adding a newline */\n  fprintf(stderr, \"%s\\n\", buffer);\n#endif\n}\n\n\n/*\n * Decide whether to emit a trace or warning message.\n * msg_level is one of:\n *   -1: recoverable corrupt-data warning, may want to abort.\n *    0: important advisory messages (always display to user).\n *    1: first level of tracing detail.\n *    2,3,...: successively more detailed tracing messages.\n * An application might override this method if it wanted to abort on warnings\n * or change the policy about which messages to display.\n */\n\nMETHODDEF(void)\nemit_message(j_common_ptr cinfo, int msg_level)\n{","sourceCodeStart":92,"sourceCodeEnd":128,"githubUrl":"https://github.com/DrKLO/Telegram/blob/45ab8f4308496e1f01026a97fcdb0d58a5274474/TMessagesProj/jni/mozjpeg/jerror.c#L92-L128","documentation":"This is the libjpeg/mozjpeg default error_exit handler: it formats the active JPEG error message via format_message into a buffer and prints it to stderr with a newline. It is the catch-all emitter for every JPEG library error that routes through the error manager; the '%s' is the formatted message text, not a specific error.","triggerScenarios":"Any internal libjpeg error (e.g. corrupt JPEG data, unsupported marker, bad Huffman table, wrong number of components) that calls ERREXIT/ERREXIT2 and uses the default error_exit. The buffer content is determined by cinfo->err->msg_code and format_message.","commonSituations":"Feeding truncated or non-JPEG data to the decoder, mismatched colorspace parameters, corrupt quantization/Huffman tables, or an API misuse the library detects internally. This line is where ALL such errors become visible text.","solutions":["Read the formatted message text (the %s) to identify the specific JERR_* code and address that root cause.","Install a custom error_exit to capture cinfo->err->msg_code for programmatic handling instead of relying on text.","Validate input is a well-formed JPEG (SOI/EOI markers, correct segment lengths) before decoding.","On Windows the same path can raise a MessageBox via USE_WINDOWS_MESSAGEBOX; disable that define for headless builds."],"exampleFix":"// before: default handler prints + aborts\n// after: custom error_exit captures the code\nstruct my_err { struct jpeg_error_mgr pub; j_msg_code_t code; };\nstatic void my_exit(j_common_ptr cinfo) {\n  ((struct my_err*)cinfo->err)->code = cinfo->err->msg_code;\n  longjmp(((struct my_err*)cinfo->err)->setjmp_buf, 1);\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"#include <jpeglib.h>\n#include <setjmp.h>\nstruct err_jmp { struct jpeg_error_mgr pub; jmp_buf jb; };\nstatic void my_err_exit(j_common_ptr c) {\n  longjmp(((struct err_jmp*)c->err)->jb, 1);\n}\n/* setup */\nstruct err_jmp e;\ncinfo.err = jpeg_std_error(&e.pub);\ne.pub.error_exit = my_err_exit;\nif (setjmp(e.jb)) {\n  char buf[JMSG_LENGTH_MAX];\n  cinfo.err->format_message((j_common_ptr)&cinfo, buf);\n  /* handle buf / msg_code here instead of aborting */\n  jpeg_destroy_decompress(&cinfo);\n  return -1;\n}","preventionTips":["Always install a custom error_exit with setjmp/longjmp to avoid process abort.","Validate input JPEG markers (SOI at 0xFFD8) before decoding.","Log cinfo->err->msg_code for programmatic handling, not message text."],"tags":["mozjpeg","error-handler","generic","libjpeg","jerror"],"backgroundTag":null,"analyzedSha":"45ab8f4308496e1f01026a97fcdb0d58a5274474","analyzedAt":"2026-08-14T05:19:30.815Z","schemaVersion":2},"datasetVersion":"2026-08-14T10:17:34.591Z"}