OP_RETRUN to take B as matching exception; ref
MODIFY
include/mruby/opcode.h
include/mruby/opcode.h
@@ -82,7 +82,7 @@ enum {
OP_JMPIF,/* A sBx if R(A) pc+=sBx */
OP_JMPNOT,/* A sBx if !R(A) pc+=sBx */
OP_ONERR,/* sBx rescue_push(pc+sBx) */
- OP_RESCUE,/* A clear(exc); R(A) := exception (ignore when A=0) */
+ OP_RESCUE,/* A B R(A) := exc; R(B) := matched (ignore if A/B=0) */
OP_POPERR,/* A A.times{rescue_pop()} */
OP_RAISE,/* A raise(R(A)) */
OP_EPUSH,/* Bx ensure_push(SEQ[Bx]) */

MODIFY
mrbgems/mruby-compiler/core/codegen.c
mrbgems/mruby-compiler/core/codegen.c
@@ -1294,7 +1294,7 @@ codegen(codegen_scope *s, node *tree, int val)
node *n2 = tree->car;
int exc = cursp();
- genop(s, MKOP_A(OP_RESCUE, exc));
+ genop(s, MKOP_AB(OP_RESCUE, exc, 0));
push();
while (n2) {
node *n3 = n2->car;
@@ -1788,7 +1788,7 @@ codegen(codegen_scope *s, node *tree, int val)
genop(s, MKOP_A(OP_POPERR, 1));
noexc = genop(s, MKOP_Bx(OP_JMP, 0));
dispatch(s, onerr);
- genop(s, MKOP_A(OP_RESCUE, exc));
+ genop(s, MKOP_AB(OP_RESCUE, exc, 0));
genop(s, MKOP_A(OP_LOADF, exc));
dispatch(s, noexc);
loop_pop(s, NOVAL);

OP_RETRUN to take B as matching exception; ref #3487