create a valid DefIdTable for proc macro crates #53711
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At least the incremental compilation code, and a few other places in the compiler, require the CrateMetadata for a loaded target crate to contain a valid DefIdTable for the DefIds in the target. Previously, the CrateMetadata for a proc macro contained the crate's "host" DefIdTable, which is of course incompatible with the "target" DefIdTable, causing ICEs. This creates a DefIdTable that properly refers to the "proc macro" DefIds. Fixes rust-lang#49482.
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📌 Commit 025d014 has been approved by |
bors
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michaelwoerister
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create a valid DefIdTable for proc macro crates At least the incremental compilation code, and a few other places in the compiler, require the CrateMetadata for a loaded target crate to contain a valid DefIdTable for the DefIds in the target. Previously, the CrateMetadata for a proc macro contained the crate's "host" DefIdTable, which is of course incompatible with the "target" DefIdTable, causing ICEs. This creates a DefIdTable that properly refers to the "proc macro" DefIds. Fixes #49482. r? @michaelwoerister Should we beta-nominate this?
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☀️ Test successful - status-appveyor, status-travis |
pietroalbini
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cc @rust-lang/compiler I'm torn on whether to backport this. The fix is a bit large — I don't have a good read on our "confidence level" that it is correct. I guess a worthy question is how much the people who filed #49482 care if it is backported. I'll ask on the issue :) |
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@nikomatsakis Regarding the possible backporting: I generally fixed this issue in my code by dropping some of the dependencies with a bit of code rework. As soon as there are few users affected by the issue, I think there is no strong need to backport this to beta. |
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discussed in compiler team meeting. Team decided PR is too big, and the bug sufficiently low rsk, that we will not backport to beta. |
pnkfelix
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At least the incremental compilation code, and a few other places in the
compiler, require the CrateMetadata for a loaded target crate to contain a
valid DefIdTable for the DefIds in the target.
Previously, the CrateMetadata for a proc macro contained the crate's
"host" DefIdTable, which is of course incompatible with the "target"
DefIdTable, causing ICEs. This creates a DefIdTable that properly refers
to the "proc macro" DefIds.
Fixes #49482.
r? @michaelwoerister
Should we beta-nominate this?