compiler: pass interface typecode through defer frames #1040
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Previously, the typecode was passed via a direct reference, which results in invalid IR when the defer is not reached in all return paths. It also results in incorrect behavior if the defer is in a loop, causing all defers to use the typecode of the last iteration.
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This is a bugfix for #1033. |
aykevl
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Apr 9, 2020
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aykevl
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aykevl
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Thanks! I've seen this bug before but didn't investigate yet (https://tinygo.org/lang-support/stdlib/#image-gif).
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Previously, the typecode was passed via a direct reference, which results in invalid IR when the defer is not reached in all return paths. It also results in incorrect behavior if the defer is in a loop, causing all defers to use the typecode of the last iteration.