zig/test/incremental/change_panic_handler

#exe {
-Mroot=main.zig
#}

#write main.zig {
pub fn main() !u8 {
    var a: u8 = undefined;
    a = 255;
    _ = a + 1;
    return 1;
}
pub const panic = std.debug.FullPanic(myPanic);
fn myPanic(msg: []const u8, _: ?usize) noreturn {
    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
    stdout_writer.interface.print("panic message: {s}\n", .{msg}) catch {};
    std.process.exit(0);
}
const std = @import("std");
const io = std.Io.Threaded.global_single_threaded.io();
#}
#update
#check stdout {
panic message: integer overflow
#}

#write main.zig {
pub fn main() !u8 {
    var a: u8 = undefined;
    a = 255;
    _ = a + 1;
    return 1;
}
pub const panic = std.debug.FullPanic(myPanic);
fn myPanic(msg: []const u8, _: ?usize) noreturn {
    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
    stdout_writer.interface.print("new panic message: {s}\n", .{msg}) catch {};
    std.process.exit(0);
}
const std = @import("std");
const io = std.Io.Threaded.global_single_threaded.io();
#}
#update "change the panic handler body"
#check stdout {
new panic message: integer overflow
#}

#write main.zig {
pub fn main() !u8 {
    var a: u8 = undefined;
    a = 255;
    _ = a + 1;
    return 1;
}
pub const panic = std.debug.FullPanic(myPanicNew);
fn myPanicNew(msg: []const u8, _: ?usize) noreturn {
    var stdout_writer = std.Io.File.stdout().writerStreaming(io, &.{});
    stdout_writer.interface.print("third panic message: {s}\n", .{msg}) catch {};
    std.process.exit(0);
}
const std = @import("std");
const io = std.Io.Threaded.global_single_threaded.io();
#}
#update "change the panic handler function value"
#check stdout {
third panic message: integer overflow
#}