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C pointer slices are no longer allowzero (#4462)

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* Slices from C pointers are no longer allowzero but instead insert a runtime assertion.

* Added a test, fixed code for cases with non-allowzero C pointers

* Create new type when flipping allow_zero, sometimes we get a cached value back from adjust_ptr_len.

* Added comments, changed panic message

* Added runtime safety test.
This commit is contained in:
Alexandros Naskos
2020-02-29 08:36:42 +02:00
committed by GitHub
parent a5a53a182a
commit 1b41f2d77e
4 changed files with 57 additions and 4 deletions
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2
src/codegen.cpp
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@@ -973,7 +973,7 @@ static Buf *panic_msg_buf(PanicMsgId msg_id) {
case PanicMsgIdExactDivisionRemainder:
return buf_create_from_str("exact division produced remainder");
case PanicMsgIdUnwrapOptionalFail:
return buf_create_from_str("attempt to unwrap null");
return buf_create_from_str("attempt to use null value");
case PanicMsgIdUnreachable:
return buf_create_from_str("reached unreachable code");
case PanicMsgIdInvalidErrorCode: