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Fix: Dereference of past-the-end iterator in linkgraph overlay tooltip (#10145)

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Jonathan G Rennison 2022-11-06 23:16:38 +00:00 committed by GitHub
parent 7711907a6b
commit e931f3061f
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1 changed files with 11 additions and 7 deletions
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18
src/linkgraph/linkgraph_gui.cpp
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@ -379,16 +379,20 @@ bool LinkGraphOverlay::ShowTooltip(Point pt, TooltipCloseCondition close_cond)
char *buf_end = buf;
buf[0] = 0;
/* Fill buf with more information if this is a bidirectional link. */
uint32 back_time = 0;
auto k = this->cached_links[j->first].find(i->first);
const auto &back = k->second;
if (k != this->cached_links[j->first].end() && back.Usage() > 0) {
SetDParam(0, back.cargo);
SetDParam(1, back.Usage());
SetDParam(2, back.Usage() * 100 / (back.capacity + 1));
buf_end = GetString(buf, STR_LINKGRAPH_STATS_TOOLTIP_RETURN_EXTENSION, lastof(buf));
if (k != this->cached_links[j->first].end()) {
const auto &back = k->second;
back_time = back.time;
if (back.Usage() > 0) {
SetDParam(0, back.cargo);
SetDParam(1, back.Usage());
SetDParam(2, back.Usage() * 100 / (back.capacity + 1));
buf_end = GetString(buf, STR_LINKGRAPH_STATS_TOOLTIP_RETURN_EXTENSION, lastof(buf));
}
}
/* Add information about the travel time if known. */
const auto time = link.time ? back.time ? ((link.time + back.time) / 2) : link.time : back.time;
const auto time = link.time ? back_time ? ((link.time + back_time) / 2) : link.time : back_time;
if (time > 0) {
SetDParam(0, time);
buf_end = GetString(buf_end, STR_LINKGRAPH_STATS_TOOLTIP_TIME_EXTENSION, lastof(buf));