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Tolerate bliting window that overflow the target

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Although we try to avoid those, ensuring it never happens is tricky,
and tolerating them avoids the crash.

Fixes #3498
This commit is contained in:
Maxime Coste 2020-05-25 22:43:40 +10:00
parent 89e0b4b830
commit cd613da050
1 changed files with 3 additions and 2 deletions
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5
src/terminal_ui.cc
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@ -145,7 +145,7 @@ struct TerminalUI::Window::Line
void TerminalUI::Window::blit(Window& target) void TerminalUI::Window::blit(Window& target)
{ {
kak_assert(pos.line + lines.size() <= target.lines.size()); kak_assert(pos.line < target.lines.size());
auto target_line = target.lines.begin() + (size_t)pos.line; auto target_line = target.lines.begin() + (size_t)pos.line;
for (auto& line : lines) for (auto& line : lines)
{ {
@ -153,7 +153,8 @@ void TerminalUI::Window::blit(Window& target)
target_line->resize(target.size.column); target_line->resize(target.size.column);
target_line->atoms.insert(target_line->erase_range(pos.column, size.column), target_line->atoms.insert(target_line->erase_range(pos.column, size.column),
line.atoms.begin(), line.atoms.end()); line.atoms.begin(), line.atoms.end());
++target_line; if (++target_line == target.lines.end())
break;
} }
} }