patch 8.0.0074
Problem: Cannot make Vim fail on an internal error.
Solution: Add IEMSG() and IEMSG2(). (Domenique Pelle) Avoid reporting an
internal error without mentioning where.
diff --git a/src/vim.h b/src/vim.h
index 5946d63..eec3e4f 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1623,6 +1623,9 @@
#define EMSG3(s, p, q) emsg3((char_u *)(s), (char_u *)(p), (char_u *)(q))
#define EMSGN(s, n) emsgn((char_u *)(s), (long)(n))
#define EMSGU(s, n) emsgu((char_u *)(s), (long_u)(n))
+#define IEMSG(s) iemsg((char_u *)(s))
+#define IEMSG2(s, p) iemsg2((char_u *)(s), (char_u *)(p))
+#define IEMSGN(s, n) iemsgn((char_u *)(s), (long)(n))
#define OUT_STR(s) out_str((char_u *)(s))
#define OUT_STR_NF(s) out_str_nf((char_u *)(s))
#define MSG_PUTS(s) msg_puts((char_u *)(s))