From f9962fb58f9463a9c8969c74871046dbc4c1668c Mon Sep 17 00:00:00 2001 From: Vsevolod Stakhov Date: Thu, 28 Sep 2023 14:41:22 +0100 Subject: [PATCH] [Minor] Fix one corner case --- lualib/lua_content/pdf.lua | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/lualib/lua_content/pdf.lua b/lualib/lua_content/pdf.lua index a8b6e984a..f6d5c0bc0 100644 --- a/lualib/lua_content/pdf.lua +++ b/lualib/lua_content/pdf.lua @@ -428,18 +428,23 @@ local function maybe_extract_object_stream(obj, pdf, task) if dict.Length and type(obj.stream) == 'table' then local len = math.min(obj.stream.len, tonumber(maybe_dereference_object(dict.Length, pdf, task)) or 0) - local real_stream = obj.stream.data:span(1, len) + if len > 0 then + local real_stream = obj.stream.data:span(1, len) - local uncompressed, filter_err = maybe_apply_filter(dict, real_stream, pdf, task) + local uncompressed, filter_err = maybe_apply_filter(dict, real_stream, pdf, task) - if uncompressed then - obj.uncompressed = uncompressed - lua_util.debugm(N, task, 'extracted object %s:%s: (%s -> %s)', - obj.major, obj.minor, len, uncompressed:len()) - return obj.uncompressed + if uncompressed then + obj.uncompressed = uncompressed + lua_util.debugm(N, task, 'extracted object %s:%s: (%s -> %s)', + obj.major, obj.minor, len, uncompressed:len()) + return obj.uncompressed + else + lua_util.debugm(N, task, 'cannot extract object %s:%s; len = %s; filter = %s: %s', + obj.major, obj.minor, len, dict.Filter, filter_err) + end else - lua_util.debugm(N, task, 'cannot extract object %s:%s; len = %s; filter = %s: %s', - obj.major, obj.minor, len, dict.Filter, filter_err) + lua_util.debugm(N, task, 'cannot extract object %s:%s; len = %s', + obj.major, obj.minor, len) end end end -- 2.39.5