diff options
| -rw-r--r-- | compiler/ccgexprs.nim | 2 | ||||
| -rw-r--r-- | tests/array/tarray.nim | 11 |
2 files changed, 12 insertions, 1 deletions
diff --git a/compiler/ccgexprs.nim b/compiler/ccgexprs.nim index 79c73b602..acf83f966 100644 --- a/compiler/ccgexprs.nim +++ b/compiler/ccgexprs.nim @@ -920,7 +920,7 @@ proc genArrayElem(p: BProc, n, x, y: PNode, d: var TLoc) = if optBoundsCheck in p.options and ty.kind != tyUncheckedArray: if not isConstExpr(y): # semantic pass has already checked for const index expressions - if firstOrd(p.config, ty) == 0: + if firstOrd(p.config, ty) == 0 and lastOrd(p.config, ty) >= 0: if (firstOrd(p.config, b.t) < firstOrd(p.config, ty)) or (lastOrd(p.config, b.t) > lastOrd(p.config, ty)): linefmt(p, cpsStmts, "if ((NU)($1) > (NU)($2)){ #raiseIndexError2($1, $2); $3}$n", [rdCharLoc(b), intLiteral(lastOrd(p.config, ty)), raiseInstr(p)]) diff --git a/tests/array/tarray.nim b/tests/array/tarray.nim index 2765ad06d..d10011ef2 100644 --- a/tests/array/tarray.nim +++ b/tests/array/tarray.nim @@ -594,3 +594,14 @@ block t17705: a = int(a) var b = array[0, int].high b = int(b) + +block t18643: + # https://github.com/nim-lang/Nim/issues/18643 + let a: array[0, int] = [] + var caught = false + let b = 9999999 + try: + echo a[b] + except IndexDefect: + caught = true + doAssert caught, "IndexDefect not caught!" |