ubsan: jerryscript/jerry-core/ecma/base/ecma-helpers-number.c:700:51: runtime error: left shift of negative value -8

[Cancelll]

JerryScript revision

ccc1525

Build platform

Ubuntu 20.04.1 LTS (Linux 5.4.0-74-generic x86_64)

Build steps

readonly FLAGS=(
  "-g -O1 -fsanitize=address,undefined -fno-sanitize-recover=undefined,address"
)
cmake -D CMAKE_C_FLAGS="${FLAG}" -D CMAKE_BUILD_TYPE=Debug -D CMAKE_INSTALL_PREFIX:PATH="${INSTALL_DIR}" "${SRC_FOLDER}"
make
make install

Test case

for (; j = 1; j *= -8) {}

Output

jerryscript/jerry-core/ecma/base/ecma-helpers-number.c:700:51: runtime error: left shift of negative value -8

Expected behavior

According to C99 standard (6.5.7/4):

The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated bits are filled with
zeros. If E1 has an unsigned type, the value of the result is E1 × 2 E2 , reduced modulo
one more than the maximum value representable in the result type. If E1 has a signed
type and nonnegative value, and E1 × 2 E2 is representable in the result type, then that is
the resulting value; otherwise, the behavior is undefined.