Use the rb_sys_fail_str macro in signal.c #7812
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Let signal.c include "internal/error.h" explicitly to ensure that the identifier rb_sys_fail_str in signal.c refers to the macro defined in "internal/error.h" instead of the actual function. That macro reads errno before evaluating its argument. Without this change, the rb_signo2signm(sig) expression in the "trap" function in signal.c will overwrite the errno before the actual rb_sys_fail_str function reads the errno.
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Let signal.c include
"internal/error.h"explicitly to ensure that the identifierrb_sys_fail_strinsignal.crefers to the macro defined in"internal/error.h"instead of the actual function.That macro reads
errnobefore evaluating its argument. Without this change, therb_signo2signm(sig)expression in thetrapfunction insignal.cwill overwrite theerrnobefore the actualrb_sys_fail_strfunction reads theerrno.Fixes: https://bugs.ruby-lang.org/issues/19635