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ringabout
2026-06-05 17:51:18 +08:00
parent cbc3c0f517
commit 4ccf3fc02f
1 changed files with 3 additions and 1 deletions
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compiler/transf.nim
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@@ -725,7 +725,9 @@ proc putArgInto(arg: PNode, formal: PType; borrowedFirstArg = false): TPutArgInt
else:
if skipTypes(formal, abstractInst).kind in {tyVar, tyLent}: result = paVarAsgn
else: result = paFastAsgn
if borrowedFirstArg and result == paDirectMapping and parampatterns.exprRoot(arg) == nil:
if borrowedFirstArg and result == paDirectMapping and parampatterns.exprRoot(arg) == nil and
parampatterns.isAssignable(nil, arg) == arNone:
# Inline iterators like `items(array)` borrow from the first argument.
# If that argument is just a transient expression, materialize it so the
# lifted closure keeps the backing storage alive across yields.