faulty SQL nested query segfault sqlc generate

Version

1.27.0

What happened?

sqlc generate sometimes silently fails and sometimes segfaults. I managed to isolate the issue to this nested query

-- name: GetAnsweredTasksWithQuestionText :many
SELECT * FROM (
    SELECT room_tasks.*, cards.question FROM room_tasks
    JOIN cards ON room_tasks.card_id = cards.id
    WHERE room_id = $1 AND answer_submitted_at IS NOT NULL AND room_tasks.deleted_at IS NULL AND cards IS NULL ORDER BY order_in_attempt DESC -- TODO: LIMIT 1000
) ORDER BY order_in_attempt ASC;

if you add the LIMIT 1000, it seems to segfault always

There is a mistake in the cards IS NULL part of the nested query, nevertheless, it should not segfault.

Relevant log output

sqlc generate --file internal/models/sqlc.yaml
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x10c0ae7]

goroutine 19 [running]:
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).sourceTables(0xc0003aaf08, 0xc0008e8420, {0x1da4160?, 0xc0004d6d10?})
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/output_columns.go:601 +0xaa7
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).outputColumns(0xc0003aaf08, 0xc0008e8420, {0x1da4160, 0xc0004d6d10})
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/output_columns.go:55 +0x45
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler)._analyzeQuery(0xc0003aaf08, 0xc00076e380, {0xc0006cd5bd, 0x182}, 0x0)
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/analyze.go:180 +0xccd
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).inferQuery(...)
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/analyze.go:114
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).parseQuery(0xc0003aaf08, {0x1da4320, 0xc00076e380}, {0xc0006cca80, 0x29ca}, {{0x0, 0x0, {0x0, 0x0}, 0x0, ...}})
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/parse.go:75 +0x386
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).parseQueries(0xc0003aaf08, {{0x0, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0}})
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/compile.go:81 +0x467
github.com/sqlc-dev/sqlc/internal/compiler.(*Compiler).ParseQueries(...)
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/compiler/engine.go:72
github.com/sqlc-dev/sqlc/internal/cmd.parse({_, _}, {_, _}, {_, _}, {{0xc000422498, 0x8}, {0xc0004224b0, 0xa}, ...}, ...)
        /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/cmd/generate.go:322 +0x2eb
github.com/sqlc-dev/sqlc/internal/cmd.processQuerySets.func1()                                                                                                                             /root/go/pkg/mod/github.com/sqlc-dev/sqlc@v1.27.0/internal/cmd/process.go:107 +0x81a
golang.org/x/sync/errgroup.(*Group).Go.func1()
        /root/go/pkg/mod/golang.org/x/sync@v0.8.0/errgroup/errgroup.go:78 +0x56
created by golang.org/x/sync/errgroup.(*Group).Go in goroutine 1
        /root/go/pkg/mod/golang.org/x/sync@v0.8.0/errgroup/errgroup.go:75 +0x96

Database schema

-- Card
CREATE TABLE IF NOT EXISTS cards (
    id SERIAL PRIMARY KEY,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
    deleted_at TIMESTAMP DEFAULT NULL,
    question VARCHAR NOT NULL
);

-- RoomTasks
CREATE TABLE IF NOT EXISTS room_tasks (
    id SERIAL PRIMARY KEY,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
    deleted_at TIMESTAMP DEFAULT NULL,
    answer_submitted_at TIMESTAMP DEFAULT NULL,

    order_in_attempt INT NOT NULL,
    room_id INT NOT NULL,
    card_id INT NOT NULL,

    answer TEXT DEFAULT '' NOT NULL,
    FOREIGN KEY (card_id) REFERENCES cards (id)
);

SQL queries

-- name: GetAnsweredTasksWithQuestionText :many SELECT FROM ( SELECT room_tasks., cards.question FROM room_tasks JOIN cards ON room_tasks.card_id = cards.id WHERE room_id = $1 AND answer_submitted_at IS NOT NULL AND room_tasks.deleted_at IS NULL AND cards IS NULL ORDER BY order_in_attempt DESC ) ORDER BY order_in_attempt ASC;

Configuration

No response

Playground URL

No response

What operating system are you using?

Linux

What database engines are you using?

PostgreSQL

sqlc-dev / sqlc