1 files changed, 15 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig
index 1fcc2770..41495a48 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -46,9 +46,15 @@ fn logFn(
 // A panic must restore the terminal (cooked mode, main screen, mouse off)
 // before the trace prints, or it lands garbled in a raw alt screen. recover()
 // no-ops unless the vaxis tty is live, so gui/tty share the handler.
+//
+// Then the same message and trace are appended to `<config dir>/crashes`
+// BEFORE stderr gets them, because stderr is the one place this program cannot
+// keep them: see crash.zig. Silent on every failure, so the fallback is
+// exactly the behaviour that was here before.
 pub const panic = if (is_emscripten) std.debug.FullPanic(std.debug.defaultPanic) else std.debug.FullPanic(struct {
     fn call(msg: []const u8, ret_addr: ?usize) noreturn {
         @import("vaxis").recover();
+        @import("crash.zig").record(msg, ret_addr);
         std.debug.defaultPanic(msg, ret_addr);
     }
 }.call);
@@ -338,6 +344,11 @@ fn nativeMain(init: std.process.Init) !void {
     opts.startup_config = found.bytes;
     opts.startup_config_path = found.path;
     opts.config_dir = found.dir;
+    // The panic handler above writes beside that init file, and this is the
+    // only place it can learn where that is — it runs with no `Options` in
+    // reach. Set for every native entry through this file, including the
+    // `--detach` daemon below, whose stderr nobody is reading.
+    if (found.dir) |d| @import("crash.zig").setDir(d);
     // `--detach` is the core with no terminal and `--attach` is a terminal
     // with no core, so the two together are a contradiction with no useful
     // reading. Refused rather than resolved by declaration order, which would
@@ -425,6 +436,10 @@ fn parseCtrlKey(raw: []const u8) ?u21 {
 // needs its own line here.
 test {
     _ = @import("user_config.zig");
+    // Reached only from the panic handler and from `nativeMain`, neither of
+    // which a test build analyses — so without this line the crash file has no
+    // test at all.
+    _ = @import("crash.zig");
     _ = @import("allocators.zig");
     _ = @import("fs_service.zig");
     // acme's control filesystem, both halves, and NOT their own b.addTest