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Make sure that CmdBuildSingleRail failure cannot modify tile rail types

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Jonathan G Rennison
2020-11-21 16:49:41 +00:00
parent f5499852b6
commit ffbb4622ad
1 changed files with 12 additions and 0 deletions
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12
src/rail_cmd.cpp
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@@ -37,6 +37,7 @@
#include "spritecache.h"
#include "core/container_func.hpp"
#include "news_func.h"
#include "scope.h"
#include "table/strings.h"
#include "table/railtypes.h"
@@ -586,6 +587,15 @@ CommandCost CmdBuildSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, u
if (!IsPlainRail(tile)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); // just get appropriate error message
const RailType old_rt = GetRailType(tile);
const RailType old_secondary_rt = GetSecondaryRailType(tile);
auto rt_guard = scope_guard([&]() {
if (flags & DC_EXEC) {
SetRailType(tile, old_rt);
SetSecondaryRailType(tile, old_secondary_rt);
}
});
ret = CheckTrackCombination(tile, trackbit, railtype, disable_dual_rail_type, flags);
if (ret.Succeeded()) {
cost.AddCost(ret);
@@ -600,6 +610,8 @@ CommandCost CmdBuildSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, u
if (ret.Failed()) return ret;
cost.AddCost(ret);
rt_guard.cancel();
if (flags & DC_EXEC) {
SetRailGroundType(tile, RAIL_GROUND_BARREN);
TrackBits bits = GetTrackBits(tile);