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-rw-r--r--std/os.zig2
1 files changed, 1 insertions, 1 deletions
diff --git a/std/os.zig b/std/os.zig
index 3409dcf6c6..a0f8d1f12b 100644
--- a/std/os.zig
+++ b/std/os.zig
@@ -2487,7 +2487,7 @@ pub fn toPosixPath(file_path: []const u8) ![PATH_MAX]u8 {
/// if this happens the fix is to add the error code to the corresponding
/// switch expression, possibly introduce a new error in the error set, and
/// send a patch to Zig.
-pub const unexpected_error_tracing = false;
+pub const unexpected_error_tracing = builtin.mode == .Debug;
pub const UnexpectedError = error{
/// The Operating System returned an undocumented error code.