error: proc-macro derive panicked compiling diesel/examples/sqlite/getting_started_step_1

[kjeremy]

Setup

cargo 0.22.0 (3423351a5 2017-10-06)

Versions

• Rust: rustc 1.21.0 (3b72af97e 2017-10-09)
• Diesel: master and v0.16.0 tag
• Database: sqlite3
• Operating System Ubuntu 16.04

Feature Flags

• diesel:
• diesel_codegen:

Problem Description

Running cargo build in diesel/examples/sqlite/getting_started_step_1 results in a failure due to proc_macro.

What are you trying to accomplish?

Build the example.

What is the expected output?

A successful build.

What is the actual output?

Compiling diesel_demo_step_1_sqlite v0.1.0 (file:///home/jkolb/diesel/examples/sqlite/getting_started_step_1)
Running rustc --crate-name diesel_demo_step_1_sqlite src/lib.rs --crate-type lib --emit=dep-info,metadata -C debuginfo=2 -C metadata=622c23df1f565981 -C extra-filename=-622c23df1f565981 --out-dir /home/jkolb/diesel/target/debug/deps -L dependency=/home/jkolb/diesel/target/debug/deps --extern dotenv=/home/jkolb/diesel/target/debug/deps/libdotenv-68cc05c844f8f562.rmeta --extern diesel_codegen=/home/jkolb/diesel/target/debug/deps/libdiesel_codegen-22e7d1b09b47ba09.so --extern diesel=/home/jkolb/diesel/target/debug/deps/libdiesel-cfa8db5236072f2a.rmeta -L native=/home/jkolb/diesel/target/debug/build/backtrace-sys-943860c9c514961f/out/.libs
error: proc-macro derive panicked
--> src/schema.rs:1:1
|
1 | infer_schema!("dotenv:DATABASE_URL");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: message: called Result::unwrap() on an Err value: "Failed to load environment variable DATABASE_URL: environment variable not found"
= note: this error originates in a macro outside of the current crate

error: Could not compile diesel_demo_step_1_sqlite.

Caused by:
process didn't exit successfully: rustc --crate-name diesel_demo_step_1_sqlite src/lib.rs --crate-type lib --emit=dep-info,metadata -C debuginfo=2 -C metadata=622c23df1f565981 -C extra-filename=-622c23df1f565981 --out-dir /home/jkolb/diesel/target/debug/deps -L dependency=/home/jkolb/diesel/target/debug/deps --extern dotenv=/home/jkolb/diesel/target/debug/deps/libdotenv-68cc05c844f8f562.rmeta --extern diesel_codegen=/home/jkolb/diesel/target/debug/deps/libdiesel_codegen-22e7d1b09b47ba09.so --extern diesel=/home/jkolb/diesel/target/debug/deps/libdiesel-cfa8db5236072f2a.rmeta -L native=/home/jkolb/diesel/target/debug/build/backtrace-sys-943860c9c514961f/out/.libs (exit code: 101)

Are you seeing any additional errors?

Steps to reproduce

Checklist

• [ X] I have already looked over the issue tracker for similar issues.

[sgrif]

You need to set the DATABASE_URL environment variable, or create a .env file with that variable.

[kjeremy]

I forgot to mention my .env contains DATABASE_URL=test.db. I also tried setting the environment variable and it still fails.