Progress panics in zig test when a terminal width is large.

[naoki9911]

Zig Version

0.10.0-dev.4327+3a9344d8f

Steps to Reproduce

Terminal width is larger than 256.

$ tput cols
382

const std = @import("std");

test "hello" {
}

Saving above code as main.zig and executing zig test main.zig.

Expected Behavior

zig test passes a test

$ zig test main.zig
All 1 tests passed

Actual Behavior

zig test crashes

$ zig test main.zig
Test [1/1] test.hello... thread 3130 panic: index out of bounds: index 264, len 256
/home/naoki/.local/zig-master/lib/std/Progress.zig:349:5: 0x23653f in refreshWithHeldLock (test)
    self.output_buffer_slice = self.output_buffer[unprintables .. unprintables + self.max_width.?];
    ^
/home/naoki/.local/zig-master/lib/std/Progress.zig:134:45: 0x21605a in end (test)
            self.context.refreshWithHeldLock();
                                            ^
/home/naoki/.local/zig-master/lib/test_runner.zig:83:18: 0x213f54 in main (test)
    root_node.end();
                 ^
/home/naoki/.local/zig-master/lib/std/start.zig:568:22: 0x212f6d in posixCallMainAndExit (test)
            root.main();
                     ^
/home/naoki/.local/zig-master/lib/std/start.zig:340:5: 0x212a32 in _start (test)
    @call(.{ .modifier = .never_inline }, posixCallMainAndExit, .{});
    ^
error: the following test command crashed:
/home/naoki/.cache/zig/o/cd5362779103cec731f993673b81c28e/test

I fixed this in #13148. Thanks for the report!

Just out of interest, how is your terminal so big? What is your resolution? Something bigger than 1920x1080?

[naoki9911]

Thanks for your reply and fix!

I encountered this issue with a 4K(3840x2160) display and VSCode's terminal with smaller characters than default.