I found a bug can crash the program today. It crash in
static int winTreeCallBranchLeafCb(Ihandle* ih, HTREEITEM hItem)
@iupwin_tree.c
SendMessage(ih->handle, TVM_GETITEM, 0, (LPARAM)(LPTVITEM)&item);
itemData = (winTreeItemData*)item.lParam;
if (itemData->kind == ITREE_BRANCH)
SendMessage may return false, and itemData will be NULL .
It may caused by delete nodes in `executeleaf_cb` .
It seems that windows may push a notify message before an item deleted, and
then it recv this message, but the item is gone.
I try to make a minimal working example , but it doesn't work every time.
-------
local tree = iup.tree {
HIDEBUTTONS = "yes",
HIDELINES = "yes",
}
local dlg = iup.dialog {
tree,
margin = "4x4",
size = "HALFxHALF",
shrink="yes",
title = "Shader Compiler",
}
local function do_some_systemcall()
for i=1,100 do
-- c:\\windows\\win.ini should be exist.
local f = io.open("c:\\windows\\win.ini","rb")
if f then
f:close()
end
end
end
local function rebuild_tree(flag, id)
tree.delnode0 = "CHILDREN"
tree.title0 = "foobar"
if flag then
tree.addbranch0 = "xxx"
tree.value = 1
do_some_systemcall()
for i=1,3 do
tree.addleaf1 = "xxx"
tree.image2 = "IMGCOLLAPSED"
end
do_some_systemcall()
else
tree.addleaf0 = "Click Me (may crash)"
tree.image1 = "IMGCOLLAPSED"
for i=0,3 do
do_some_systemcall()
tree.addleaf0 = "xxx"
tree.image1 = "IMGCOLLAPSED"
end
tree.value = id
end
function tree:executeleaf_cb(id)
rebuild_tree(not flag, id)
end
function tree:branchclose_cb(id)
rebuild_tree(not flag, id)
return iup.IGNORE
end
end
dlg:showxy(iup.CENTER,iup.CENTER)
rebuild_tree(false)
iup.MainLoop()
iup.Close()
-------
Run this program, and click the last item (named "Click Me") , it may crash
on windows 10 64bit （1709/16299.192) .
I think we should check the result of `SendMessage(ih->handle,
TVM_GETITEM, 0, (LPARAM)(LPTVITEM)&item)` to fix it, or it there a better
way ?
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