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LibVT: Prevent u16 underflow when resizing terminal to a height of 1

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Resizing the Terminal window to its smallest size no longer crashes.

Fixes #7296.
This commit is contained in:
Jelle Raaijmakers 2022-11-25 22:51:42 +01:00 committed by Andreas Kling
parent 19e6befddc
commit 441555ea56
Notes: sideshowbarker 2024-07-18 02:47:59 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/441555ea56
Pull-request: https://github.com/SerenityOS/serenity/pull/16191
Issue: https://github.com/SerenityOS/serenity/issues/7296
1 changed files with 1 additions and 1 deletions
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Userland/Libraries/LibVT/Terminal.cpp
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@ -781,7 +781,7 @@ void Terminal::scroll_up(u16 region_top, u16 region_bottom, size_t count)
} }
// Set dirty flag on swapped lines. // Set dirty flag on swapped lines.
// The other lines have implicitly been set dirty by being cleared. // The other lines have implicitly been set dirty by being cleared.
for (u16 row = region_top; row <= region_bottom - count; ++row) for (u16 row = region_top; row + count <= region_bottom; ++row)
active_buffer()[row].set_dirty(true); active_buffer()[row].set_dirty(true);
m_client.terminal_history_changed(history_delta); m_client.terminal_history_changed(history_delta);
} }