fixes deref nkStmtListExpr for ORC; ref #20246 #20261
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Don't add hacks, instead canonicalise statement list expressions. |
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ref #20246
ORC likes to create temporaries for blocks and as a result it produces
nkStmtListExprin some cases. However, it doesn't seem that we can derefnkStmtListExprproperly. In this PR, I add some hacks to circumvent it. Otherwise,tests/ccgbugs/tderefblock.nimgivesnilAccessdefect with ARC/ORC.