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Dave Abrahams
2afbfd6146
* Add assertion to detect UB in interpreter.cpp This change, applied to6e5070d("Adapting jsiek's executable semantics tooling for commit. (#237)"), causes the if2.6c test to segfault. Becase the assertion fires only when `stmt == nullptr` and no code has permission to change `stmt` (it is `const`) before it is dereferenced in the `switch`, and nothiing in `PrintStatement` is supposed to exit the program, the assertion is a valid change that detects a bug. The crash was originally manifest in29a5994("Executable Semantics: 1st-class stacks (#296)"). * Temporarily disable the if2 test pending #311 See https://github.com/carbon-language/carbon-lang/issues/311 * [executable semantics] Record exit code on expected error. This will prevent a final segfault from sneaking by, detected as a passing test. A more principled follow-up commit would bottleneck detected error exit reporting and have it write something to std::cerr that can be recognized.
45 lines
925 B
Plaintext
45 lines
925 B
Plaintext
********** source program **********
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choice Ints {
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alt None ();
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alt One Int;
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alt Two (0 = Int, 1 = Int);
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}
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fn main () -> Int {
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var auto: x = Ints.None();
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var auto: y = Ints.One(0 = 42);
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var auto: n = 0;
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match (y) {
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case Ints.None =>
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n = (n + 2);
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case Ints.One(0 = auto: x) =>
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n = ((x + 1) - 42);
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case Ints.Two(0 = auto: a, 1 = auto: b) =>
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n = 2;
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}
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match (x) {
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case Ints.One(0 = auto: x) =>
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n = (x + 2);
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case Ints.None() =>
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n = (n - 1);
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case Ints.Two(0 = auto: x, 1 = auto: y) =>
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n = 5;
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}
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return n;
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}
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********** type checking **********
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--- step exp () --->
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--- step exp Int --->
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--- step exp (0 = Int, 1 = Int) --->
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--- step exp Int --->
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--- handle value Int with (0 = Int, 1 = Int)<1>(Int,) --->
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--- step exp Int --->
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--- handle value Int with (0 = Int, 1 = Int)<2>(Int,Int,) --->
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--- step exp Int --->
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--- step exp Int --->
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--- step exp auto --->
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13: type error in call
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expected: Int
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actual: Tuple(0 = Int)
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EXIT CODE: 255
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