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stage1: Error out when trying to execute unreachable

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Closes #6802
This commit is contained in:
LemonBoy
2020-10-25 23:17:32 +01:00
committed by Andrew Kelley
parent f4bb8be9fc
commit 490cafe2c5
3 changed files with 22 additions and 2 deletions
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17
test/compile_errors.zig
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@@ -2,6 +2,21 @@ const tests = @import("tests.zig");
const std = @import("std");
pub fn addCases(cases: *tests.CompileErrorContext) void {
cases.add("unreachable executed at comptime",
\\fn foo(comptime x: i32) i32 {
\\ comptime {
\\ if (x >= 0) return -x;
\\ unreachable;
\\ }
\\}
\\export fn entry() void {
\\ _ = foo(-42);
\\}
, &[_][]const u8{
"tmp.zig:4:9: error: reached unreachable code",
"tmp.zig:8:12: note: called from here",
});
cases.add("indexing a undefined slice at comptime",
\\comptime {
\\ var slice: []u8 = undefined;
@@ -6208,7 +6223,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\ if (!ok) unreachable;
\\}
, &[_][]const u8{
"tmp.zig:10:14: error: unable to evaluate constant expression",
"tmp.zig:10:14: error: reached unreachable code",
"tmp.zig:6:20: note: referenced here",
});